A firm evaluates 4 investment projects with cash flows as provided in the table below. The required rate of return (discount rate) is 5%. 1. Calculate the NPV, the PP. the IRR and the PI of the 4 projects. 2. If the firm faces no budget constraints, which projects should be selected? 3. If the firm has a budget of $150, which projects should be selected? 4. If the firm has a budget constraint of 160$ and it can take any project multiple times, what is the best project combination? 5. If the four projects are mutually exclusive, which should the firm do