Marginal Benefits and Marginal Costs Exercise 3 Emmanuel likes gardening. He grows zucchini that he sells at the local farmers' market. The table below describes the benefits and costs Emmanuel faces as he decides how many hours to dedicate to his garden each week. Emmanuel's Gardening Benefits and Costs Hours Spent Total Benefit Marginal Benefit Total Cost Marginal Cost Gardening (dollars] (dollars) (dollars] (dollars] 1 $21 $21 @ $3 39 18 9 6 0 54 15 18 66 12 30 12 0 75 9 45 15 81 63 18 84 30 84 21 0 a. Complete the "Marginal Benefit" and "Marginal Cost" columns in the table above. b. Graph the marginal benefit and marginal cost points calculated in part a