Question 1 John always consumes 3 bottle of cokes (C) with 4 slices of pizza (S). The respective prices of coke and pizza are Pc and Ps. a. Write a utility function that represents John's preferences. b. Find John's demands for cokes and pizzas. c. On a diagram, show both the Slutsky substitution and income effects for coke if the price of coke is going down (assuming that coke is on the horizontal axis and both coke pizza are normal goods)