Consider the following cash flows: Year WN-O Cash Flow -$28,300 15,400 13,500 9,900 a. What is the profitability index for the cash flows if the relevant discount rate is 9 percent? (Do not round intermediate calculations and round your answer to 3 decimal places, e.g., 32.161.) b. What is the profitability index if the discount rate is 14 percent? (Do not round intermediate calculations and round your answer to 3 decimal places, e.g., 32.161.) c. What is the profitability index if the discount rate is 25 percent? (Do not round intermediate calculations and round your answer to 3 decimal places, e.g., 32.161.) a. b. c. Profitability index Profitability index Profitability index