Exhibit 99.3

                            CONFIRMING STATEMENT

	This Statement confirms that the undersigned, Bob Peck, has
authorized and designated Siu Chiang to execute and file on the undersigned's
behalf all filings that the undersigned may be required to file with the
U.S. Securities and Exchange Commission under Section 13 or Section 16 of the
Securities and Exchange Act of 1934, as amended (the "Act").  The authority
of Siu Chiang under this Statement shall remain in full force and effect
until revoked by the undersigned in a signed writing provided to Siu Chiang.
The undersigned acknowledges that Siu Chiang is not assuming any of the
undersigned's responsibilities to comply with Section 13 or Section 16 of
the Act.


Date: November 13, 2012				/s/ Bob Peck