Question: 5. Consider: max(x =21 max{ x = 22) s.t. XES where U = 2,22 (a) In the nonnegative orthant, are the contours of U convex

5. Consider: max(x =21 max{ x = 22) s.t. XES where U = 2,22 (a) In the nonnegative orthant, are the contours of U convex or concave? (b) Is U convex or concave? (c) Graph S = {re R? | x; 21,x, + x2
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