2. For each utility function, determine what bundle of goods is more preferred.

a) U(x1, x2) = 3(x1)(x2); (1, 6) or (3, 3)

b) U(x, y) = 3*x + 12*y; (1,6) or (3,3)

c) U(x1, x2, x3) = 2(x1)*5(x2)^2*(x3); (3,3,3) or (1,5,1)