QUESTION 10 Price MC 158 99 90 S 77 ATC AVC $50 50 45 I D = AR = MR D Quantity Q 95 (millions) 10 12 20 In the short-run, the perfectly competitive firm shown in the graph on the right above should Please note that AR is the same thing as Price (P). O shut down O produce 10 units of output O produce 12 units of output produce 20 units of output