Question: DJS Investment Services must develop an investment portfolio for a new client. As an initial investment strategy, the new client would like to restrict the test portfolio to a mix of two stocks: Stock Price/Share AGA Products $ 50 Key Oil 100 Estimated Annual Return (%) 6 10 The client wants to invest $50,000 and established the following two investment goals. Priority Level 1 Goal Goal 1: Obtain an annual return of at least 9%. Priority Level 2 Goat Goal 2: Limit the investment in Key Oil, the riskier investment, to no more than 60% of the total investment. a. Formulate a goal programming model for the DJS Investment problem. b. Use the graphical goal programming procedure to obtain a solution.