15. The Long-Line is considering mutually exclusive investments. Each investment is expected to cost $220,000. Assume 20 percent discount rate. The cash flows are as follows: Year Chemical Co. Water Co. 1 S10,000 $95,000 2 $36.000 $95.000 3 $40,000 $92.000 4 $75,000 $85,000 5 $90,000 $50,000 6 $90,000 $35.000 7 $90,000 $25,000 As a manager of the firm considering the above projects, what should you do under the Payback period and why? (6 points)