(a) Is free parking on or around a university campus a public good (is free parking non-excludable and non-rival)? Please explain. Many universities, including ESU, make some limited free parking lots available to students. (b) Many universities (including ESU) provide free parking on all campus parking lots after 5:00 pm and on weekends. Does the time of the day make a difference in whether parking is a public good? Please explain. (c) Why don't universities provide free parking in all their parking lots until after about 5:00 pm or on weekends. Please explain