For legal reasons, only one firm is allowed to sell smartphones in a small country. The firm's marginal cost curve for smartphones is . There are no fixed = 100 + 20 costs. The inverse demand curve is . P is the price in dollars and Q is = 500 30 the number of hundred thousand smartphones.

A. Suppose there was a price ceiling of $320, find the monopolist's profit. B. Suppose there was a price ceiling of $320, find the consumer surplus. C. Suppose there was a price ceiling of $260, find the monopolist's profit. D. Suppose there was a price ceiling of $260, find the consumer surplus. E. Suppose there was a price ceiling of $200, find the monopolist's profit. F. Suppose there was a price ceiling of $200, find the consumer surplus.