Consider the demand for gasoline given by: p = 10-0.75Q And the supply of gasoline given by: p=0.25Q Suppose the marginal external costs of gasoline are $2.5 per gallon. What is the competitive equilibrium? What is total welfare in this case? What is the Pareto Optimum? What is total welfare in this case? Suppose the government imposes a tax of $1 per gallon to try and address the externality. What is the competitive equilibrium under the Pigouvian tax? What is total welfare in this case? Does the tax achieve the optimal amount of wealth (i.e., that which is attained under the Pareto optimum)?