Explanation of Responses

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On September 24, 2010, in connection with the termination of Mr. Walkup's employment relationship, the issuer's Compensation Committee agreed to amend Mr. Walkup's outstanding January 12, 2010 restricted stock award to (i) allow the unvested shares to vest through July 31, 2012, and (ii) eliminate the vesting requirement that Mr. Walkup still be employed with the issuer on the vesting date of the award. This amendment results in a deemed cancellation of the "original" restricted stock award and the grant of a replacement restricted stock award. Accordingly, 33.4% of Mr. Walkup's unvested award vested if and only if the Compensation Committee certified that the issuer's Class A common stock closed at or above $7.00 for twenty consecutive trading days, commencing January 1, 2011, and ending July 31, 2012, which the Compensation Committee certified on February 7, 2011. Of the remaining 66.6% of Mr. Walkup's unvested award, 33.3% will vest if and only if the Compensation Committee certifies that the issuer's Class A common stock closed at or above $9.00 for twenty consecutive trading days before July 31, 2012, and the final 33.3% will vest if and only if the Compensation Committee certifies that the issuer's Class A common stock closed at or above $11.00 for twenty consecutive trading days before July 31, 2012.

WALKUP CHRISTOPHER 4