Tutorial Question 4 Consider the utility function U : R2 -> R defined by U(x1, 2'2) = Jaln (x1) + (1 - a) In (x2) if (21, 12) ER4, -Do if (x1, X2) ER? \\R7+, 2 where 0 0, and x2 > 0. Does Weierstrass' Theorem of the Maximum guarantee that there is a solution to this problem? Justify your