Consider a two good exchange economy with two individuals, A and B. A's preference is represented by U(a) = 0.3 lnxA1 + 0.7 lnxA2 and B's is represented by U(b) = .8lnxB1 + .2lnxB2. A's initial holding is (10,4) and B's is (8,12). Calculate the demand function for each of A and B.