A company is considering five investments. The initial cash outflow (cost) and net present value (yield) for each investment are given in the associated Excel shell file. The cash available for investment is $13,000. Note that if the company wishes to take part in any of these investments, it must "go all the way." In other words, partial investments are not permitted. Furthermore, the company's investment policies require the following: (a) at most three of the five investments can be undertaken; (b) if investment 3 is undertaken, then investment 4 must be undertaken as well; and (c) if investment 5 is undertaken, then investment 2 cannot be undertaken. Formulate and solve an appropriate integer programming model to help this company identify a feasible investment plan that maximizes total net present value