(a) Let demand for car batteries be such that Q = 10 2P. Assume constant marginal costs of 3. Compute the equilibrium price, quantity, consumer surplus, producer surplus for

i. A perfectly competitive firm

ii. A monopoly

iii. Two firms engaged in Cournot Competition.

iv. Assume one of the two firms has a marginal cost of 2 but the other is as before. What is the oligopoly outcome in this case?