(Reuters) - British oil major BP Plc (BP.L) on Tuesday agreed to sell all its Alaskan properties for $5.6 billion to privately held Hilcorp Energy Co, exiting a region where it operated for 60 years. The BP Exploration (Alaska) Inc. headquarters is pictured in Anchorage, Alaska, U.S. August 27, 2019. REUTERS/Yereth RosenThe deal, which includes…