AMENDMENT NO. 6 dated as of July 28,
                                    1999  to the  Loan  and  Security  Agreement
                                    dated as of February 5, 1998 (as  heretofore
                                    amended, the "Loan Agreement"), by and among
                                    MERRILL  LYNCH  INTERNATIONAL  BANK  LIMITED
                                    (the   "Lender"),   MERRILL   LYNCH  CAPITAL
                                    SERVICES  INC.  ("MLCS") and BELAIR  CAPITAL
                                    FUND LLC (the "Borrower").

                             INTRODUCTORY STATEMENT

     All  capitalized  terms not  otherwise  defined  in this  Amendment  are as
defined in the Loan Agreement.

     The  Borrower has  requested  (and the Lender has agreed to) an increase in
the Commitment to $655,000,000.

     Accordingly, the parties hereto hereby agree as follows:

     SECTION 1.  AMENDMENTS  TO LOAN  AGREEMENT.  The Loan  Agreement  is hereby
amended as of the Effective  Date (subject to the terms and conditions set forth
in Section 2 hereof) as follows:

     (A) The  definition  of  Commitment  appearing  in  Article  1 of the  Loan
Agreement is hereby amended in its entirety to read as follows:

          ""COMMITMENT"  shall  mean  six  hundred  fifty-five  million  dollars
     ($655,000,000) or such lesser amount if reduced pursuant to Section 2.10."

     SECTION 2.  CONDITIONS TO  EFFECTIVENESS.  This Amendment is subject to the
satisfaction  in full of the following  conditions  (the first date on which all
such conditions have been satisfied being herein called the "Effective Date"):

     (A) the Lender shall have received  counterparts  of this Amendment  which,
when taken together, bear the signatures of all parties hereto;

     (B) the Lender shall have received an Acknowledgment (in form and substance
satisfactory  to  the  Lender)  executed  by  the  Borrower  and  the  Custodian
confirming  that the  Securities  Account  Agreement  remains  in full force and
effect;

     (C) the Lender shall have received a promissory note in the form of Exhibit
A to the Loan Agreement in the amount of  $655,000,000  (a "New Note") which New
Note shall replace the Note currently held by the Lender and shall be deemed the
Note for purposes of the Loan Agreement and the Lender shall return the existing
Note to the Borrower;


     (D) the Lender shall have received a favorable  written  opinion of Counsel
to the  Borrower,  dated the  Effective  Date,  addressed to the Lender,  to the
effect  that  this  Amendment  and the New Note  have  been  duly  executed  and
delivered  by the  Borrower  and,  together  with the Loan  Agreement  as hereby
amended,  constitute the legal,  valid and binding  obligations of the Borrower,
enforceable in accordance with their respective terms and no consent or approval
of any governmental authority or regulatory body to the execution,  delivery and
performance of this Amendment or the New Note or to the borrowings thereunder is
required by law, or if any such  consent or  approval is  necessary  it has been
obtained,  which opinion shall be satisfactory  to Morgan,  Lewis & Bockius LLP,
counsel for the Lender;

     (E) the Lender shall have received (i) a certificate  of the Manager of the
Borrower, dated the Effective Date and certifying that (1) the provisions of the
Operating Agreement  authorize the Manager to authorize the execution,  delivery
and performance in accordance  with their terms of this Amendment,  the New Note
and the other documents and transactions  contemplated by this Amendment and the
borrowings  under  the  Note and that the  Manager  has so  authorized  and such
authorization  is in full force and effect and (2)  neither the  certificate  of
organization nor the Operating Agreement of the Borrower have been amended since
February 5, 1998 (other than the Amended and  Restated  Operating  Agreement  as
amended by the First  Amendment  thereto dated  November 24, 1998) and (ii) such
other  documents as the Lender or Morgan,  Lewis & Bockius LLP,  counsel for the
Lender, may reasonably request; and

     (F)  all  legal  matters  in  connection   with  this  Amendment  shall  be
satisfactory to Morgan, Lewis & Bockius LLP, counsel for the Lender.

     SECTION 3.  REPRESENTATIONS AND WARRANTIES.  The Borrower hereby represents
and warrants that:

     (A) the representations and warranties  contained in the Loan Agreement are
true and  correct in all  material  respects  on and as of the date hereof as if
such  representations and warranties had been made on and as of the date hereof;
and

     (B) the Borrower is in  compliance  with all the terms and  provisions  set
forth in the Loan Agreement and, after giving effect hereto, no Default or Event
of Default has occurred and is continuing.

     SECTION 4. FULL FORCE AND EFFECT.  Except as expressly amended hereby,  the
Loan Agreement  shall  continue in full force and effect in accordance  with the
provisions thereof on the date hereof. As used in the Loan Agreement,  the terms
"Agreement",  "this Agreement" "herein",  "hereafter",  "hereto",  "hereof", and
words of similar import, shall, unless the context otherwise requires,  mean the
Loan Agreement as amended by this Amendment.

                                       2

     SECTION  5.  APPLICABLE  LAW.  THIS  AMENDMENT  SHALL  BE  GOVERNED  BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

     SECTION 6.  COUNTERPARTS.  This Amendment may be executed in  counterparts,
each of which shall constitute an original, but all of which when taken together
shall constitute but one instrument.

     SECTION  7.   EXPENSES.   The  Borrower   agrees  to  pay  all   reasonable
out-of-pocket   expenses   incurred  by  the  Lender  in  connection   with  the
preparation,  execution  and  delivery  of this  Amendment,  including,  but not
limited to, the reasonable  fees and  disbursements  of Morgan,  Lewis & Bockius
LLP, counsel for the Lender.

     SECTION 8. HEADINGS. The headings of this Amendment are for the purposes of
reference  only and  shall  not  affect  the  construction  of or be taken  into
consideration in interpreting this Amendment.

     IN WITNESS  WHEREOF,  the undersigned have caused this Amendment to be duly
executed as of the date first written above.

                                BELAIR CAPITAL FUND, L.L.C.

                                BY:     EATON VANCE MANAGEMENT,
                                          as Manager

                                        BY:  /S/ THOMAS E. FAUST, JR.
                                             ------------------------
                                             Name:    Thomas E. Faust, Jr.
                                             Title:   Vice President
                                             Address: The Eaton Vance Building
                                                      255 State Street
                                                      Boston, MA  02109
                                             Telephone No.: 617-482-8260
                                             Telecopier No.: 617-482-3836


                                       3

                                MERRILL LYNCH CAPITAL SERVICES, INC.


                                BY:  /s/ Roger Baum
                                     ------------------------
                                     Name:     Roger Baum
                                     Title:
                                     Address:  Merrill Lynch World Headquarters,
                                               World Financial Center
                                               North Tower, 22nd Floor
                                               250 Vessey Street
                                               New York, New York   10281-1322
                                     Telephone No.:  212-449-0291
                                     Telecopier No.:  212-449-1788


     The Lender is a member of The Securities and Futures  Authority Limited and
operates a Client  Complaints  Procedure.  If for any reason the Borrower should
have cause for concern or complaint,  the Borrower  should  contact the Manager,
PBG Operations, at the Lender's address indicated below.

                                MERRILL LYNCH INTERNATIONAL
                                BANK LIMITED


                                BY:  /S/ JENNIFER A. BERESKA
                                     --------------------------------
Executed in London,                  Name:    Jennifer A. Bereska
England on ________, 1999            Title:   Associate Director
                                     Address: 123 Buckingham Palace Road
                                              5th Floor
                                              London SW1 W9TD
                                              England
                                     Telephone No.:
                                     Telecopier No.:


AGREED TO:

MERRILL LYNCH INTERNATIONAL
  PRIVATE FINANCE LIMITED


By:  /s/ Fred Reinhardt
     --------------------------------
     Name:  Fred Reinhards
     Title:

                                       4

                                            AMENDMENT  NO.  5 dated  as of March
                                    17, 2000 to the Loan and Security  Agreement
                                    dated as of February 5, 1998 (as  heretofore
                                    amended, the "Loan Agreement"), by and among
                                    MERRILL  LYNCH  INTERNATIONAL  BANK  LIMITED
                                    (the   "Lender"),   MERRILL   LYNCH  CAPITAL
                                    SERVICES  INC.  ("MLCS") and BELAIR  CAPITAL
                                    FUND LLC (the "Borrower").

                             INTRODUCTORY STATEMENT

     All  capitalized  terms not  otherwise  defined  in this  Amendment  are as
defined in the Loan Agreement.

     The  Borrower has  requested  (and the Lender has agreed to) an increase in
the Commitment to $765,000,000.

     Accordingly, the parties hereto hereby agree as follows:

     SECTION 1.  AMENDMENTS  TO LOAN  AGREEMENT.  The Loan  Agreement  is hereby
amended as of the Effective  Date (subject to the terms and conditions set forth
in Section 2 hereof) as follows:

     (A) The  definition  of  Commitment  appearing  in  Article  1 of the  Loan
Agreement is hereby amended in its entirety to read as follows:

          ""COMMITMENT"  shall mean seven  hundred  sixty-five  million  dollars
     ($765,000,000) or such lesser amount if reduced pursuant to Section 2.10."

     SECTION 2.  CONDITIONS TO  EFFECTIVENESS.  This Amendment is subject to the
satisfaction  in full of the following  conditions  (the first date on which all
such conditions have been satisfied being herein called the "Effective Date"):

     (A) the Lender shall have received  counterparts  of this Amendment  which,
when taken together, bear the signatures of all parties hereto;

     (B) the Lender shall have received an Acknowledgment (in form and substance
satisfactory  to  the  Lender)  executed  by  the  Borrower  and  the  Custodian
confirming  that the  Securities  Account  Agreement  remains  in full force and
effect;

     (C) the Lender shall have received a promissory note in the form of Exhibit
A to the Loan Agreement in the amount of  $765,000,000  (a "New Note") which New
Note shall replace the Note currently held by the Lender and shall be deemed the
Note for purposes of the Loan Agreement and the Lender shall return the existing
Note to the Borrower;


     (D) the Lender shall have received a favorable  written  opinion of Counsel
to the  Borrower,  dated the  Effective  Date,  addressed to the Lender,  to the
effect  that  this  Amendment  and the New Note  have  been  duly  executed  and
delivered  by the  Borrower  and,  together  with the Loan  Agreement  as hereby
amended,  constitute the legal,  valid and binding  obligations of the Borrower,
enforceable in accordance with their respective terms and no consent or approval
of any governmental authority or regulatory body to the execution,  delivery and
performance of this Amendment or the New Note or to the borrowings thereunder is
required by law, or if any such  consent or  approval is  necessary  it has been
obtained,  which opinion shall be satisfactory  to Morgan,  Lewis & Bockius LLP,
counsel for the Lender;

     (E) the Lender shall have received (i) a certificate  of the Manager of the
Borrower, dated the Effective Date and certifying that (1) the provisions of the
Operating Agreement  authorize the Manager to authorize the execution,  delivery
and performance in accordance  with their terms of this Amendment,  the New Note
and the other documents and transactions  contemplated by this Amendment and the
borrowings  under  the  Note and that the  Manager  has so  authorized  and such
authorization  is in full force and effect and (2)  neither the  certificate  of
organization nor the Operating Agreement of the Borrower have been amended since
February 5, 1998 (other than the Amended and  Restated  Operating  Agreement  as
amended by the First  Amendment  thereto dated  November 24, 1998) and (ii) such
other  documents as the Lender or Morgan,  Lewis & Bockius LLP,  counsel for the
Lender, may reasonably request; and

     (F)  all  legal  matters  in  connection   with  this  Amendment  shall  be
satisfactory to Morgan, Lewis & Bockius LLP, counsel for the Lender.

     SECTION 3.  REPRESENTATIONS AND WARRANTIES.  The Borrower hereby represents
and warrants that:

     (A) the representations and warranties  contained in the Loan Agreement are
true and  correct in all  material  respects  on and as of the date hereof as if
such  representations and warranties had been made on and as of the date hereof;
and

     (B) the Borrower is in  compliance  with all the terms and  provisions  set
forth in the Loan Agreement and, after giving effect hereto, no Default or Event
of Default has occurred and is continuing.

     SECTION 4. FULL FORCE AND EFFECT.  Except as expressly amended hereby,  the
Loan Agreement  shall  continue in full force and effect in accordance  with the
provisions thereof on the date hereof. As used in the Loan Agreement,  the terms
"Agreement",  "this Agreement" "herein",  "hereafter",  "hereto",  "hereof", and
words of similar import, shall, unless the context otherwise requires,  mean the
Loan Agreement as amended by this Amendment.

                                       2

     SECTION  5.  APPLICABLE  LAW.  THIS  AMENDMENT  SHALL  BE  GOVERNED  BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

     SECTION 6.  COUNTERPARTS.  This Amendment may be executed in  counterparts,
each of which shall constitute an original, but all of which when taken together
shall constitute but one instrument.

     SECTION  7.   EXPENSES.   The  Borrower   agrees  to  pay  all   reasonable
out-of-pocket   expenses   incurred  by  the  Lender  in  connection   with  the
preparation,  execution  and  delivery  of this  Amendment,  including,  but not
limited to, the reasonable  fees and  disbursements  of Morgan,  Lewis & Bockius
LLP, counsel for the Lender.

     SECTION 8. HEADINGS. The headings of this Amendment are for the purposes of
reference  only  -------- and shall not affect the  construction  of or be taken
into consideration in interpreting this Amendment.

     IN WITNESS  WHEREOF,  the undersigned have caused this Amendment to be duly
executed as of the date first written above.

                                BELAIR CAPITAL FUND, L.L.C.

                                BY:     EATON VANCE MANAGEMENT,
                                          as Manager

                                        BY:  /S/ THOMAS E. FAUST, JR.
                                             ------------------------
                                             Name:    Thomas E. Faust, Jr.
                                             Title:   Vice President
                                             Address: The Eaton Vance Building
                                                      255 State Street
                                                      Boston, MA  02109
                                             Telephone No.: 617-482-8260
                                             Telecopier No.: 617-482-3836


                                       3

                                MERRILL LYNCH CAPITAL SERVICES, INC.


                                BY:  /s/ Roger Baum
                                     ----------------------------
                                     Name:    Roger Baum
                                     Title:
                                     Address: Merrill Lynch World Headquarters,
                                              World Financial Center
                                              North Tower, 22nd Floor
                                              250 Vessey Street
                                              New York, New York   10281-1322
                                     Telephone No.:  212-449-0291
                                     Telecopier No.:  212-449-1788


     The Lender is a member of The Securities and Futures  Authority Limited and
operates a Client  Complaints  Procedure.  If for any reason the Borrower should
have cause for concern or complaint,  the Borrower  should  contact the Manager,
PBG Operations, at the Lender's address indicated below.

                                MERRILL LYNCH INTERNATIONAL
                                BANK LIMITED


                                BY:  /S/ JENNIFER A. BERESKA
                                     ------------------------------
Executed in London,                  Name:    Jennifer A. Bereska
England on ________, 1999            Title:   Associate Director
                                     Address: 123 Buckingham Palace Road
                                              5th Floor
                                              London SW1 W9TD
                                              England
                                     Telephone No.:
                                     Telecopier No.:


AGREED TO:

MERRILL LYNCH INTERNATIONAL
  PRIVATE FINANCE LIMITED


By:  /s/ Stephanie Villalva
     ------------------------------
     Name:  Stephanie Villalva
     Title:

                                       4