5. You are thinking of making an investment in a textile mill. The CFs of the investment are below. Today -2,400 1 yr 600 2 yr 800 3 yr 1,000 4 yr 1.200 a. If your discount rate is 18%, is it a good investment? b. Calculate the NPV for the CFs with each of these interest rates: 5%, 10%, 15%, 20%. Estimate the IRR based on this information, and explain your estimate