Consider the following cash flows:

Year	Cash Flow
0	$28,400
1	15,300
2	13,600
3	10,000

a.	What is the profitability index for the cash flows if the relevant discount rate is 8 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 13 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 22 percent? (Do not round intermediate calculations and round your answer to 3 decimal places, e.g., 32.161.)