The management of Revco Products is exploring four different investment opportunities. Information on the four projects under study follows: The net present values above have been computed using a 10\% discount rate. Limited funds are available for investment, so the company can't accept all of the avallable projects. Required: 1. Compute the profitability index for each investment project. 2. Rank the four projects according to preference, in terms of net present value, profitability index, and internal rate of return