You have 3 projects with the following cash flows: (Click on the following icon in order to copy its contents into a spreadsheet) Year 0 1 2 3 Project 1 -$151 $18 $41 $62 $81 Project 2 -823 0 0 7,004 -6,495 Project 3 20 42 62 81 247 a. For which of these projects is the IRR rule reliable? b. Estimate the IRR for each project to the nearest 1%). c. What is the NPV of each project if the cost of capital is 5% 20% 50%