11.1 The marginal product of effort of Mac, a typical worker in a fast-food burger joint, is one-fourth burgers per hour; that is, MP. = .25. The price of a burger is $2. The figure below graphs Mac's marginal cost of effort. VMPe (cents/unit) 60 50 40 30 20 10 0 2 4 6 8 10 12 14 effort (units/hour) (a) If Mac increases his effort by one unit per hour, the change in the burger joint's revenue is $ per hour. That is, what is IMP the value of Mac's marginal product of effort? Plot the IMP, curve in the figure. (b) Mac's efficient effort e is the solution to what equation? Illustrate the solution in the figure. Mac's efficient effort is e = _units of effort per hour. (c) If the price of a burger rises from $2.00 to $2.80, what happens to Mac's efficient level of effort? (d) If the marginal-cost-of-effort curve shifts down, what happens to e? (e) Suppose the market for fast-food workers like Mac is competitive. If Mac's quantity supplied of effort is efficient, how much does he earn per hour