a. What are the positive or negative externalities related to sport schools for children in Almaty? Name at least three positive or negative externalities. [4 points] b. On a graph, show the marginal private benefit (MPB), marginal social benefit (MSB), marginal private cost (MPC), and marginal social cost (MSC) and label them accordingly on your graph. [2 points] c. On your graph, show the private market equilibrium quantity and the social optimum quantity of sports classes. [2 points] d. Propose measures to make the sports schools affordable to all parents. Explain how the proposed by you measures will affect the market price and quantity of sports schools' services.