Firm 1's MAC equals MAC1(e1) = 4 e1, for e1 4. Firm 2's MAC equals MAC2(e2) = 4, for e2 4. Firm 3's MAC equals MAC3(e3) = 8 2e3, for e3 2. [Note: firm 3's emissions cannot exceed 2.] (4 pts) Suppose we were to impose a uniform emissions standard. We set a maximum emissions level of e for each firm, which they each cannot exceed. What e should we set to achieve the socially efficient total emissions level? Is the resulting outcome socially efficient? Explain the reasoning behind your