A monopoly has the following demand, marginal revenue and marginal costs: Demand: P = 72-Q Marginal revenue: MR = 72 -2Q Constant marginal cost: MC = 12 A. how much output should be produced and sold to maximize profits? B. What is the price at which the firm can sell its profit maximizing output at? C. What is the firm's total profits from selling its profit maximizing output?