ECON Apples is selling apples in a purely competitive market.Its output is 5000 pounds, which it sells for $5 a pound.At the 5000-pound level of output, the average variable cost is $4.00, the marginal cost is $4.25, and the average total cost is $4.50 a pound.Should the firm increase output, decrease output, or not produce?Why?How should the firm determine the optimal level of output?