producing steel. Producing a ton of steel imposes a marginal external u Quantity of Total Marginal Total cost to Marginal Cost to Marginal Social Steel (tons) Revenue Revenue producers producers Cost 900 100 W N P 1,500 230 2,000 390 4 2,400 600 2,700 900 6 2,800 1,330 a. Calculate the marginal revenue per ton of steel and the marginal cost per ton of steel to steel producers. Then calculate the marginal social cost per ton of steel. b. What is the market equilibrium quantity of steel production? c. What is the socially optimal quantity of steel production? d. What is the optimal Pigouvian tax to remedy the problem created by the negative externality