The hypothetical city of Hurstville is trying to decide how many city beautification projects should be approved each year. These projects involve planting gardens, commissioning 1,000 MSB murals, and building fountains. The city has two types of 900 citizens. Type B citizens appreciate beauty more than type A 800 citizens. There is an equal number of each type of citizen. The accompanying graph depicts each type of citizen's 700 marginal benefit for city beautification projects. The average 600 cost of each project is $400. Use the information in the graph Marginal benefit / Marginal cost ($ 500 to answer the questions. 400 Use the interactive points to draw the marginal social benefits (MSB) curve. 300 What is the optimal quantity of city beautification projects? 200 100 MB MB B A O 1 2 3 4 5 6 7 8 9 Quantity of projects projects City beautification is a public good because