3. For each of the three utility,F functions, below, that Jim might have over beer [3}, in pints) and coffee ((3, in cups), do the following three problems. (i) \"mat is Jim's Marginal Rate of Substitution of beer for coffee, as a function of b and :3? [Beer is X , Coffee is Y] (ii) Given your answer to (i), if .lini chooses to buy 4 pints of beer and 9 cups of coffee, what must he the ratio of the price of pints of beer to the price of cups of coffee