Year Cash Flow 18,800 11,100 10,000 6,500 WN a. What is the profitability index for the set of 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 for the set of cash flows if the relevant 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 for the set of cash flows if the relevant discount rate is 21 percent? (Do not round intermediate calculations and round your answer to 3 decimal places, e.g., 32.161.) a. Profitability index b. Profitability index c. Profitability index