=9.9. Dwight Moody is the manager of a large farm with 1,000 acres of arable land. For greater efficiency, Dwight always devotes the farm to growing one crop at a time. He now needs to make a decision on which one of four crops to grow during the upcoming growing season. For each of these crops, Dwight has obtained the following estimates of crop yields and net incomes per bushel under various weather conditions.

After referring to historical meteorological records, Dwight also has estimated the following prior probabilities for the weather during the growing season:
Dry 0.3 Moderate 0.5 Damp 0.2