The accompanying diagram shows the demand, marginal revenue, and marginal cost of a monopolist. a) Determine the profit-maximizing output and price. b) What price and output would prevail if this firm's product was sold by price-taking firms in a perfectly competitive market? c) Calculate the deadweight loss of this monopoly. $120 MC 110 100 90 80 70 60 50 30 20 10 MR D 0 Quantity 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15