(Please explain how you calculate and come up with the answer, not just give me the correct answer as I can find the answer myself on the Internet)

Figure 3-1 1' The graph below represents the various combinations of ham and cheese (in pounds) that the nation of m could produce in a given month. Cheese 3 60 inpatmdh} 320 230 240 200 160 120 ED 40 40 SD 120 160 200 240 230 320 360 400 Ham (inpatmds) Refer to Figure 311. If the production possibilities frontier shown is for 240 hours of production, then which of the following combinations of ham and cheese could Bonovia produce in 240 hours? a. 225 pounds of ham and 140 pounds of cheese b. 280 pounds of ham and 100 pounds of cheese c. 35 5 pounds of ham and 80 pounds of cheese d. 330 pounds of ham and 60 pounds of cheese