1. Is the presence of the police on campus a private good or a public good? Explain why or why not.

2. If the cost of hiring a guard is $16, how many should be hired to maximize NSG? What is the maximum NSG?

3. Show your answer to #2 with a diagram. (You should be able to see, both the maximum level of Q and the maximum NSG in your diagram)

A HU PUPIL BURNEY JI your CILY 4. The table sets out the benefits that Terri and Suc receive from on-campus police at night: Police officers Marginal benefit on duty Terri Sue (number per night) (dollars per police officer) 18 22 14 18 10 14 6 10 2 6 Suppose that Terri and Sue are the only students on campus at night. Draw a graph to show the marginal social benefit from the on-campus police at night