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.
a. Draw the MC(marginal cost), ATC (average-total-cost), MR (marginal revenue), 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?