Which of the following scenarios involves a public good? Select the correct answer below: 1. Susan purchases one half of a bushel of tomatoes for only $0.75 per pound. 2. Michael enjoys taking his kids to fish in a local lake on weekends when the weather is nice. 3. Mary pays an annual membership fee to have access to the dog park in her neighborhood. 4. Kyle's commute to work was cut in half after the city built a new bridge in his town that allows him to cross the river without going as far out of his way.