An investment project has annual cash inflows of $4,000, $4,900, $6,100, and $5,300, for the next four years, respectively. The discount rate is 13 percent. What is the discounted payback period for these cash flows if the initial cost is $6,700? What is the discounted payback period for these cash flows if the initial cost is $8,800? What is the discounted payback period for these cash flows if the initial cost is $11,800