The marginal cost of a monopolist is given by MC (q ) = 2 + 2q while market demand is
q = 10 - p .
(a) Find the firm's marginal revenue.
(b) What is the profit-maximizing level of output and price?
(c) If TC = 2 + 2q + q^2 , does the monopolist make any profit?
(d) What is the competitive market equilibrium? Find social cost of monopoly.