A recent study found that the demand and supply schedules for cheese are as follows. Price per pound Quantity demanded Quantity supplied $21 100 pounds 400 pounds $18 120 pounds 320 pounds $15 150 pounds 250 pounds $12 190 pounds 190 pounds $9 240 pounds 140 pounds $6 300 pounds 100 pounds $3 360 pounds 70 pounds a. Find the equilibrium price. b. Find the equilibrium quantity