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. Consider a market with two identical firms: Firm A and Firm B. . The market demand is P = 68 - 4 Q, where Q = qA + qB. . Firms' cost structure is such that MCA = MCB = ACA = ACB = 4. Write the expression for the firms' reaction functions: (a) Firm A's reaction function = (Write the function in its simplest form. Reduce numeric values to the smallest number of decimal places required.) (b) Firm B's reaction function = (Write the function in its simplest form. Reduce numeric values to the smallest number of decimal places required.)