Who can create valuable output out of idle property?

For a perfectly competitive corn grower in Nebraska, the marginal revenue curve is

A) downward sloping. B) the same as its demand curve. C) upward sloping. D) U-shaped. E) vertical at the profit maximizing quantity of production.

Suppose a duopoly had reached the monopoly outcome and then the first firm increased its production. If the second firm next increases its production, the second firm's profit ________ and the first firm's profit ________

A) increases; increases B) increases; decreases C) decreases; increases D) decreases; decreases E) increases; does not change