EX-99 4 exa_sc13ga2-align.txt EXHIBIT A EXHIBIT "A" Pursuant to Rule 13d-1(k)(1)(iii) of Regulation 13D-G of the General Rules and Regulations of the Securities and Exchange Commission under the Securities Exchange Act of 1934, as amended, the undersigned agree that the statement to which this Exhibit is attached is filed on behalf of them in the capacities set forth herein below. OAK HILL CAPITAL PARTNERS, L.P. By: OHCP GENPAR, L.P., general partner By: OHCP MGP, L.L.C., general partner By: /s/ Kevin G. Levy --------------------------------------- Kevin G. Levy, Vice President OAK HILL CAPITAL MANAGEMENT PARTNERS, L.P. By: OHCP GENPAR, L.P., general partner By: OHCP MGP, L.L.C., general partner By: /s/ Kevin G. Levy --------------------------------------- Kevin G. Levy, Vice President