Suppose that a firm in a competitive market faces the following revenues and costs: Quantity (Units) Marginal Cost (Dollars) Marginal Revenue (Dollars) 12 5 7 13 6 7 14 7 7 15 8 7 16 9 7 17 10 7 Refer to Table 14-5. If the firm is currently producing 14 units, what would you advise the owners? Decrease quantity to 13 units Increase quantity to 15 units Continue to operate at 14 units Increase quantity to 16 units