For numbers 16-19, consider the following problem (6 pts): Suppose that there is a negative externality in the market for pizza rolls. The graph below shows the supply and demand curves for pizza rolls. 14 13 S (MSC) 12 Price of pizza rolls ($) N 3 4 5 6 7 8 9 10 11 12 13 14 Quantity of pizza rolls 16. What is the market equilibrium quantity? 17. What is the market price? 18. What is the optimal quantity? 19. (3 pts) What should the government do in order to ensure the market produces optimal/efficient quantity? Explain