1)Consider a marginal cost function of MC = 6 + 2Q and a constant price of P = 12. Which Q maximizes net benefits (producer surplus)?

2)Consider a marginal cost function of MC = 6 + 2Q and a constant price of P = 12. Additionally, there are negative externalities of E= 3 per unit of Q . Without regulation, what is the total net social benefit of production (total social benefits - total social costs)?

3)Consider a marginal cost function of MC = 6 + 2Q and a constant price of P = 12. Additionally, there are negative externalities of E= 3 per unit of Q . What is the total net social benefit of production (total social benefits - total social costs) at the socially optimal level of production?