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. Consider a market with two identical firms: Firm A and Firm B. . The market demand is P = 26 - 2 Q, where Q = qA + qB. . Firms' cost structure is such that MCA = MCB = ACA = ACB = 3 (a) Write the expression for market demand in terms of Firm A's and Firm B's output levels. P(qA, qB) = (b) Write the expression for Firm A's marginal revenue function in terms of Firm A's and Firm B's output levels. MRA(qA, qB) = (Write the function in its simplest form.)