D Question 8 1 pts D Question 9 1 pts The demand curve for a good that produces a The demand curve for a good that produces a negative externality is equal to Pd=100-Q. The negative externality is equal to Pd=100-Q. The marginal private cost is equal to MPC=10+Q. marginal private cost is equal to MPC=10+Q. The marginal external cost is equal to MEC=Q. The marginal external cost is equal to MEC=Q. What is quantity does the market generate? What is quantity is socially optimal? 20 O 20 O 25 O 25 O 30 O 30 O 35 O 35 40 40 O 45 O 45 50 50 D Question 5 1 pts Consider the graph below, which shows the outcome of a negative externality. MSC MPC A PM Q SE Q'M Q Choose ALL THE AREAS that represent the cost of the externality at the market outcome. O ABCD O EFG O BCDEFG O CDFGH