Please solve all the questions. Thank you.

Sarah has the following utility function U(x, y) = x + xy - x. What is Sarah's marginal utility for x evaluated at x = 5 and y = 5?Sarah has the following utility function U(x1 , X2) = X1 X2 which bundles of goods does she weakly prefer to (12,1). Check all that apply. a. (4, 5) b. (3, 2) O c. (1, 12) O d. (1, 2) O e. (8, 2) Of. ( 1, 12)% Sandy is a utility maximizing consumer with well-behaved preferences. Her MRS: 3x72. She faces the 1 following prices p1 = 6, p2 = 6, and has the following income m = 384. How much x1 will Sandy consume