$. The Long-Line is considering mutually exclusive investments. Each investment is expected to cost $200,000. Assume 20 percent discount rate. The cash flows are as follows: Note: If the projects are mutually exclusive, you can choose both. You have to choose only one project. Year Chemical Co. $10,000 $36,000 $40,000 $75,000 $90,000 $90,000 $90,000 $90,000 Water Co. $95,000 $95,000 $92,000 $85,000 $50,000 $35,000 $25,000 $10,000 a) As a manager of the firm considering the above projects, what should you do under the Payback Period and why? b) As a manager of the firm considering the above projects, what should you do under the NPV and why