A total of 50 units of good x and 40 units of good y must be divided between two consumers, Amy and Ben. If Amy consumes xA of good x, then Ben consumes xB=50-xA of good x. If Amy consumes yA of good y, then Ben consumes yB=40-yA of good y. Amy's utility function is UA(xA,yA0=xA*yA. Ben's utility function is UB(xB,yB)=xB+yB. Which of the following (xA,yA) allocations is in the core starting from an initial allocation that gives Amy the bundle (20,10)? (15.5, 15.5) (13.5, 13.5) (16.5, 16.5) (14.5, 14.5)