4 An investor is considering three types of investments a high risk venture into oil leases with a potential return of 15 a medium risk investment in bonds with a 9 return and a relatively safe stock investment with a 5 return He has 50 000 to invest Because of the risk he will limit his investment in oil leases and bonds to 30 of the 50 000 and his investment in oil leases and stock to 50 How much should he invest in each to maximize his return assuming investment returns are as expected a Define the variables Be specific with descriptive words b Clearly state the constraints all inequalities related to the feasible region c State the objective function d Set up the initial simplex matrix needed to solve the linear programming problem using the Simplex Method Perform all niyots necessory using row onerations to transform the