Exercise 2: Public Goods Provision (25 points) Consider three consumers indexed by i = {1, 2, 3} with the following demand functions for a public good G: P1 = 10 - 1 G, P2 = 10 - 1 1 20 20 G, P3 = 20 - 10 G where pi is the price consumer i is willing to pay for G. (a) (10 pts) If marginal cost is contant at $15, what is the private provision of public good G? (b) (15 pts) If marginal cost is contant at $15, what is the optimal level of public good