For each utility function, determine what bundle of goods is more preferred. Show your calculations. (a) U(x1, x2) = 10x 2 1 + 5x 3 2 + 6x1x2 , for (2,4) or (3,2) (5 points) (b) U(x1, x2, x3) = 5x 4 1x 3 2x3 + 4x1x2 , for (2,3,2) or (2,2,4) (5 points)