1 539. 1 540. 1 5-41. (b) Suppose that Hank is more interested in the letter grade he will get. The dividing scores for the passing letter grades A to D are 90, 80, 70, and 60, respectively. Would this attitude toward grades call for a change in Hank's course of action? For the upcoming planting season, Farmer McCoy can plant corn 611), wheat (a2), or soybeans (2:3) or use the land for grazing (a4). The payoffs associated with the different actions are influenced by the amount of rain: heavy rainfall (51), moderate rainfall ( 92), light rainfall (53}, or drought (54). The payoff matrix (in thousands of dollars} is estimated as Develop a course of action for Farmer McCoy based on each of the four decisions under uncertainty criteria. One of N machines must be selected for manufacturir units of a specific product. The minimum and maximum demands for the product are] * and Q\