Question: Starting with the reaction functions of duopolists A and B from Problem 4 (p. 403 in text), find the Cournot solution algebraically.

Given the reaction function of duopolist A, Q_A = (12 – Q_B)/2(1) and the reaction function of duopolist B, Q_B = (12-Q_A)/2(2), find the Cournot solution, that is find the Q_A and Q_B by substituting (1) and (2).