| December 14, 2018 | ||
| Date | ||
| /s/ Kim M. Silva | ||
| Signature | ||
| Kim M. Silva | ||
| Attorney-in-fact for: | ||
| SPO Partners II, L.P. (1) | ||
| SPO Advisory Partners, L.P. (1) | ||
| San Francisco Partners, L.P. (1) | ||
| SF Advisory Partners, L.P. (1) | ||
| SPO Advisory Corp. (1) | ||
| John H. Scully (1) | ||
| Phoebe Snow Foundation, Inc. (1) | ||
| Eli J. Weinberg (1) | ||
| Ronak R. Gandhi (2) |
| (1) | A Power of Attorney authorizing Kim M. Silva to act on behalf of this person or entity has been previously filed with the Securities and Exchange Commission on December 22, 2014. |
| (2) | A Power of Attorney authorizing Kim M. Silva to act on behalf of this person or entity has been previously filed with the Securities and Exchange Commission on February 14, 2017. |
