III. Use a marginal benefit/marginal cost graph for bridge use to analyze the effect of a toll on a popular and crowded bridge, given that the toll is charged at all times of day. Assume that the marginal cost for using the bridge is just the toll charge. Explain how this effects the negative externalities created by driving. (4 points)

V. Explain in words how your answer to part III would be different if the toll was on a rural interstate rather than an urban bridge. (4 points)

Question 3 is just for context. I want Question 5 answered but feel free to answer Question 3 too if you'd like. There is no other information needed.