Suppose that a perfectly competitive firm's AVC curve is given by AVC = WQ, and its marginal cost curve is given by MC = 2WQ, where W is the wage rate.

a. Graph the firm's AVC and MC curves if W = 20.

b. How many units of output will the firm produce at a market price of $3,200?

c. Graph the firm's AVC and MC curves if the wage rate falls to $10.

d. How many units of output will the firm now produce at a market price of $3,200?