|MCCOLLUM MARK A filed this Form 3 on 05/21/2018|
POWER OF ATTORNEY
Know all by these presents, that the undersigned hereby constitutes and appoints each of the following: L. Benjamin Ederington, Julia Feng and Joel Iglesias signing singly, the undersigned’s true and lawful attorney-in-fact to:
The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming that all such attorney-in-fact, or such attorney-in-fact’s substitute or substitutes, shall lawfully do or case to be done by virtue of this power of attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned’s responsibilities to comply with Section 16 of the Securities Exchange Act of 1934.
This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4, and 5 with respect to the undersigned’s holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.
IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed effective as of January 26, 2018.
/s/ MARK A. MCCOLLUM
MARK A. MCCOLLUM
Before me on this 26th day of January, 2018, personally appeared Mark A. McCollum and acknowledged to me that he executed the foregoing for the purposes therein expressed.
MARY M. MURRELL
Notary Public, State of Texas
My Commission Expires:
June 9, 2018