An investment project has annual cash inflows of $4,900, $3,400, $4,600, and $3,800, and a discount rate of 13 percent.

a) What is the discounted payback period for these cash flows if the initial cost is $5,200?

b) What is the discounted payback period for these cash flows if the initial cost is $7,300?

c) What is the discounted payback period for these cash flows if the initial cost is $10,300?