A firm produces harmful emissions, the level of which is denoted by e. This firm's marginal cost of reducing emissions is given by MCR = 100 - e. The marginal benefit to society from reducing emissions is mbR = -20 + e. Answer each of the following questions based on the above information. Round your answer to the nearest second decimal place (i.e., .01,Question 1 What is the equilibrium level of emissions without government intervention? Question 2 What is the optimal level of emissions? Question 3 I If the government sets an emission tax to induce the optimal level of emissions, what level should that tax be set per unit of emission