AGREEMENT AND PLAN OF MERGER among COLLECTIVE BRANDS, INC., WBG—PSS HOLDINGS LLC, WBG—PSS MERGER SUB INC., and solely for purposes of Sections 6.5, 6.8, 6.9 (other than 6.9(e)), 6.13, 6.14(a), 6.17 and ARTICLE IX, WOLVERINE WORLD WIDE, INC. Dated as...