In long run equilibrium, the pure monopolist can make pure profits because of A. Blocked entry В. The high price he charges C. The low LAC costs D. Advertising

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Sol-Motors is the only auto manufacturer in West Lidia, a country that prohibits the importation of cars. The graph below shows the demand and the costs for Sol-Motors. Costs and revenues (in thousands) 130 120 110 100 90 80 70 60 50 40 30 20 10 0 Price: $ 15. 45 75 9010512013550165180195 30 60 Quantity per period (in thousands) MC D thousands a. Add the marginal revenue curve to the graph above (starting at zero). Plot only the end points. b. What are Sol-Motors' profit-maximizing output and price? Output: thousands Tools MR K c. Suppose that the government of Lidia imposes a price ceiling of $35,000 per car. What is the firm's profit-maximizing output now? Profit-maximizing output: thousands d. What would be the output if the graph represented a perfectly competitive industry rather than a monopoly? Output: thousands

. Given perfect competition show, on a diagram that profit maximisation implies marginal revenue = marginal cost = price. Briefly explain how and why this outcome differs from the equilibrium with the monopolist.