ADVANCED ANALYSIS Given the following: zA = 30 - 4x zB = 20 - 5y, where z is marginal utility per dollar spent, x is the amount spent on product A, and y is the amount spent on product B. Assume that the consumer has $7 to spend on A and B—that is: x + y = $7. Instructions: Enter your answers as whole numbers. a. How is the $7 best allocated between A and B? $ on A. $ on B. b. How much utility will the marginal dollar yield? utils.