Nika Rad has saved up $5000 to invest. There are five possible investment funds each with an expected annual return and a risk level which are provided in the attached workbook. No more than 40% of the $5000 should be invested in any one fund. Nika wants to invest the full $5000, achieve a return of at least 8.5%, with minimum risk. Which of the following are true about the linear programming formulation of this problem? There are 5 decision variables. There are 5 constraints. It is a maximization problem. There are lower bounds on the decision variables. Exactly two of these answers are correct. None of these answers are correct.