Can't figure out how to graph this

Score: 0 of 4 pts 26 of 29 (27 complete) HW Sc End of Chapter 4.6 Suppose that Joe and Jill are the only two people in the small town of Andover. Andover has land available to build a Q park of no more than 9 acres. Joe and Jill's demand schedules for the park (and the supply schedule) are as follows: 40 Joe's Jill's Number Demand Demand Supply of (Price Per (Price Per (Price Per Acres Acre) Acre) Acre) 20 20 18 18 C 16 16 14 14 12 12 Price per acre 10 10 8 8 1.) Use the line drawing tool to draw a graph showing the marginal social cost curve and the marginal social benefit curve 2 3 4 5 6 7 8 9 10 11 12 for the park. Properly label this line. Quantity (number of acres) 2.) Use the point drawing tool to plot a point that shows the optimal size park. Properly label this point. Carefully follow the instructions above, and only draw the required objects