QUESTION 28 U(X, Y) = min {3X, 4Y] 3X + 4Y =72 What is the optimal consumption bundle? O X=15, Y=20 O X=5, Y=7.5 O X=12, Y=9 X=10, Y=9 O None of these answers. QUESTION 29 U(X, Y) = min {3X, 4Y} 3X + 4Y =72 What's the slope of the Engle curve for X? None of these answers. 0 8 04 0 6 QUESTION 30 U(X, Y) = min {3X, 4Y] 3X + 4Y =72 What is the slope of the Engel Curve for Y? 0 6 0 4 O None of these answers