AutoTime, a manufacturer of 24-hr variable timers, has monthly fixed costs of $48,000 and a production cost of $8 for each timer manufactured. The timers sell for $15each. (a) What is the cost function? (b) What is the revenue function? (c) What is the profit function? (d) Compute the profit (loss) corresponding to a production level of 3800, 5500, and 11,500 timers, respectively. (Input a negative value to indicate a loss.)