An investment project has annual cash inflows of $6,400, $6,900, $7,400, and $8,400, and a discount rate of 11 percent. (Do not round intermediate calculations. Round the final answers to 2 decimal places.)

a. What is the discounted payback period for these cash flows if the initial cost is $9,500?

Discounted payback period years

b. What is the discounted payback period for these cash flows if the initial cost is $12,500?

Discounted payback period years

c. What is the discounted payback period for these cash flows if the initial cost is $18,000?

Discounted payback period years