Suppose $10 is to be allocated between two people, A and B. Their preferences over A's income, ?^a?, and B's income, ?^b?, are the following:

Suppose $10 is to be allocated between two people, A and B. Their preferences over A's income, x4, and B's income, x, are the following: uA(x4, xB ) = (x4) (xB + 2) and uB (x4, xB) = (x4 + 4) (xB). Find the Pareto efficient income distributions