a. Identify the two decisions to be made and define a decision variable for each one. b. Describe why this problem is a preemptive goal-programming problem by giving quantitative expressions for each of the goals in terms of the decision variables defined in part a. c. Draw a single two-dimensional graph where the two axes correspond to the decision variables defined in part a. Consider each of the goals in order of priority and use the quantitative expression obtained in part b for this goal to draw a plot on the graph that displays the values of the decision variables that fully satisfy this goal. After completing this for all the goals, use the graph to determine the optimal solution for this preemptive goal-programming problem. ad Use preemptive goal programming to formulate and solve this problem on a spreadsheet