9. A monopolist with a straight-line demand curve finds that it can sell two 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. (LO14-2)

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?