Use the following information to answer the next four questions about a market with a positive externality: Supply Curve: P=20+Q Marginal Private Benefit (MPB): MPB=200-2Q Marginal External Benefit (MEB): MEB=37-0.1Q . What is the market-generated equilibrium quantity? . What is the socially optimal quantity? . What is the value of the deadweight loss? (| suggest you draw the graph before you answer this and the next question) . What is the value of the optimal per unit subsidy