9. A monopolist with a straight-line demand curve finds that it can sell 2 units at $12 each or 12 units at $2 each. Its fixed cost is $20 and its marginal cost is constant at $3 per unit. (1014-2) a. Draw the MC, ATC, MR, and demand curves for this monopolist. b. At what output level would the monopolist produce? c. At what output level would a perfectly competitive firm produce