Based on the best available econometric estimates, the market elasticity of demand for your firms product is -2. The marginal cost of producing the product is constant at $150, while average total cost at current production levels is $225. Determine your optimal per unit price if: a. You are a monopolist. b. You compete against one other firm in a Cournot oligopoly. c. You compete against 19 other firms in a Cournot oligopoly.