1. Suppose that the demand curve is P = 9 - Q and the costs of production are C = q2 + 9. The marginal cost function is MC = 2q.
(a) What are the second-best-where P = AC and the market clears-price and output?
(b) Could an entrant profitability enter by undercutting the incumbent? How?
(c) Is the natural monopoly sustainable? What about if competition is Cournot postentry?