Mandy has preferences over books and magazines. Her preferences are represented by the utility function U = MB, where B represents the quantity of books consumed and M represents magazines. (a) At a combination of 20 magazines and 10 books, what is Mandy's utility? (b) At a combination of 20 magazines and 10 books, what is Mandy's marginal utility of magazines? (c) At a combination of 20 magazines and 10 books, what is Mandy's MRS? (d) What is the loss of utility by moving from a bundle of 20 books and magazines each to a bundle of 20 books and 10 magazines? (e) How many books are required along with 10 magazines to give the same utility as 20 of each