The table below shows the various levels of a city's pollution cleanup along with the marginal benefit and marginal cost. Pollution Cleanup Quantity of Marginal Pollution Marginal Benefit Cleanup Cost (dollars ) (units) (dollars) $500 $100 400 200 300 100 300 200 150 400 100 200 500 ces Instructions: Enter your answers as a whole number. a. Suppose the city decides to undertake a cleanup level of 25 units. The marginal benefit of cleaning up the 25th unit is $ The marginal cost of cleaning up the 25th unit is $ Since the marginal benefit is (Click to select) | the marginal cost, the city should clean up (Click to select) pollution. b. Suppose the city decides to undertake a cleanup level of 200 units. The marginal benefit of cleaning up the 200th unit is $ The marginal cost of cleaning up the 200th unit is $ Since the marginal benefit is (Click to select) |the marginal cost, the city should clean up (Click to select) pollution