This table contains data on the social costs and benefits incurred in improving water quality in a lake. Complete the table below, what is the optimal water pollution amount of improving the water quality in a lake. Enter you answer as a numeric value e.g. 12. Water Pollution Total Marginal Total Marginal (PPM) Costs Cost Benefits Benefit 45 20 120 35 25 190 25 35 240 10 65 270 O 100 280