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Use the following information for questions 18 and 19. Suppose the marginal external cost of producing steel is MEC = 2Q. The marginal private cost of producing steel is MPC = 4Q. The demand for steel is given by MPB = MSB = 120 - 4Q. (The demand curve represents marginal private benefit, which equals marginal social benefit.) For question 18, what is the socially efficient level of output of steel? 15 units O 20 units 12 units O 6 unitsUse the following information for questions 18 and 19. Suppose the marginal external cost of producing steel is MEC = 2Q. The marginal private cost of producing steel is MPC = 4Q. The demand for steel is given by MPB = MSB = 120 - 4Q. (The demand curve represents marginal private benefit, which equals marginal social benefit.) For question 19, how much output would be produced without any government regulation? O 20 units O 6 units O 15 units O 12 unitsWhat is the correct order of the four stages of normal political development? 0 Development, Legislative, Politicization, Implementation O Legislative, Implementation, Development, Politicization Q Politicization, Legislative, Implementation, Development 0 Development, Politicization, Legislative, Implementation