Suppose that there is a duopoly in operating systems. The market inverse demand function is: P(Q) = 400 - 2Q and the marginal costs of each firm are $50/unit. Quantity units are "units". a) [3] Suppose that firms successfully collude by agreeing to price at the monopoly price and to equally divide market shares. Write down the COLLUSIVE profit equation as a function of market output (Q)