A firm sells its product in a competitive market where all firms charge a price of IDR 40,000 per unit. The firm's total costs are given as below: C(Q) = 2,805 + 122 Q + Q2 a. How much output should the firm produce in order to maximize profit? b. What is the difference between production (and cost) in the short-run and the long-run? c. In what sense competitive market is an ideal market structure?