Suppose a market is served by two firms (a duopoly). The market demand function given by P = 1200 - Q1 - Q2 where Q is the output produced by firm 1 and Q2 is the output produced by firm 2. Firm 1's cost of production is given by the function C(Q,) = 120Q, and firm 2's cost of production is given by the function C(Q2) = 120Q2. The average cost of firm 1 is given by AC, = 120 and the average cost of firm 2 is given by AC, = 120. Marginal profit function for firm 1: An1=1080-2Q1-Q2 AQ1 Marginal profit function for firm 2: An2= 1080-Q, -2Q2 A QWhat will be the profit earned by each of the symmetric firms in the Cournot market equilibrium? (A) $129,600, $129,600 [First number belongs to firm 1 and second number belongs to firm 2.] (B) $126,900, $126,900 (C) $128,600, $126,800 (D) $129,900, $129,900