year	cash flow
0	- 28300
1	15400
2	13500
3	9900

a. What is the profitability index for the above set of cash flows if the relevant discount rate is 9 percent? (Do not round intermediate calculations. Round your answer to 3 decimal places (e.g., 32.161).)

b. What is the profitability index for the above set of cash flows if the relevant discount rate is 14 percent? (Do not round intermediate calculations. Round your answer to 3 decimal places (e.g., 32.161).)

c. What is the profitability index for the above set of cash flows if the relevant discount rate is 25 percent? (Do not round intermediate calculations. Round your answer to 3 decimal places (e.g., 32.161).)