Linear Programming

(a) (b) TradeCo wants to invest at most $10,000 in 2021. Two investment options are proposed: STK and BD, with annual yields of 20% and 10% respectively. Based on market research, TradeCo wishes to limit the amount invested in STK to no more than 60% of the total investment. How should TradeCo invest to generate the highest annual yield? Develop an LP model that represents the problem. Please clearly state decision variables, objective and constraints. You do not need to solve it. Please limit the answer to within one page. (15 marks) Suppose that TradeCo imposes one more restriction: investment in BD should be at least or times the investment in STK where a is a non-negative constant. Find the optimal solution to the problem and discuss how the value of a would affect TradeCo's best investment decision and annual yield. Please limit the answer to within two pages. [Hint use the graphical method and solve for the optimal solution in terms of a.] (25 marks)