Question 11 (4 points): Consider the following table of total social costs and total social benefits from a governmental policy to remove small quantities of pharmaceuticals - including antibiotics, hormones, mood stabilizers, and other drugs - from our drinking water supplies. What level of removal is most efficient by general economic criteria? WHY? Show your work. (Hint: MB=MC) Level of removal Total Costs Total Benefits 0% $0 $0 10% 15 85 20% 35 155 30% 60 220 40% 90 280 50% 125 335 60% 165 385 70% 210 430 80% 260 465 90% 315 485 100% 375 500 6