Question

An investor has $20,000 to invest in a portfolio of three accounts. Account 1 offers a return of 2% and at a low risk. Account 2 offers a return of 4% and has a medium risk. Account 3 offers a return of 5% but at a relatively high risk. He decided to invest no more than $3000 into account 3 and at least twice as much in Account 1 into the investment of Account 2.

a) Formulate this as a linear programming problem ( i.e. specify constraint equations and objective function aimed at maximizing the overall return on investment)

b) Specify this problem in Microsoft Excel

c) Use Excel’s solver add-in to determine what amounts should be invested in each account in order to maximize the year and return?

I am having trouble constructing this as a linear programming problem. I do not know how to incorporate the the low, medium, and high risks into the objective and/or constraint problems. Below is what I have so far. If you could help for part B or C. It would be very helpful.

Objective Function represents an equation that will maximize the return of the investment. Account 1 (A1)-returns 2% of the investment ( Low risk) -Account 2 (A2)-returns 4% of the investment ( Medium risk) Account 3 (A3)-returns 5% of the investment ( High risk) Constraint Functions (Are these the correct constrainsts?) A1 + A2 + A3-20000 ( max investment is $20,000) A1-? A2 2 A1 A3 3000

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K12 Maximize overall 1 Decision variables 2 A1 3 A2 4 A3 Objective return on investment 0 Constraints Total investment accoun115 Objective Maximize overall return on investment 0.02*B2+0.04*B3+0.05*B4 1 Decision variables 2 A1 3 A2 4 A3 Constraints TFile Home Insert Draw Page Layout Formulas Data Review Solver Parameters From Text/CSV From Web Recent Sources Queries & ConnMaximize overall 1 Decision variables 2 A1 3 A2 4 A3 Objective return on investment 11333.33 5666.667 3000 603.3333333 Constr

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