Please refer to the following question:

The mosquito abatement program is a public good, and it gives benefits to two towns. The demand for mosquito abatement net by town 1 is p, = 220 - Q, and the demand by town 2 is p, = 50 - Q/2, where Q is the quantity of mosquito abatement net. The marginal cost of providing the mosquito abatement net is MC = 60 + Q. If both towns set the amount of mosquito abatement net independently, what is the total quantity under the competitive market? What is the socially optimal quantity of mosquito abatement net? Discuss the relationship between the competitive quantity and the socially optimal quantity