STOCK PURCHASE AGREEMENT AMONG AMERICAN BANKERS INSURANCE GROUP, INC., GLOBAL INDEMNITY GROUP, INC., Solely for the purposes of Sections 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.9, 5.11, 5.14, 5.15(b), 5.16, 5.18 and 5.22 and Article XI ASSURANT, INC., AND...