See spreadsheet included for cash flows: 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 0%, 5%, 20%, 40%? Year Project 1 Project 2 Project 3 $ $ $ 0 (200) $ 1,000 $ 20 $ 1 20 $ $ 40 $ 2 40 $ $ 60 $ 3 60 $ 7,000 $ 80 $ 86 (6,000) (250) See spreadsheet included for cash flows: 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 0%, 5%, 20%, 40%