2. (10 points) Amy, Bill, and Carla all mow lawns for money. Each of them operates a different lawn mower. The accompanying table shows the total cost to Amy, Bill and Carla of mowing lawns. Quantity of Lawns Mowed 3. Calculate Amy's, Bill's, and Carla's marginal costs for each quantity of lawns mowed (except zero lawns, where MC is not defined). b. Who has increasing marginal cost, who has decreasing marginal cost, and who has constant marginal cost? 0. Which of these three people are experiencing diminishing marginal returns in production and how do you know that