An investment project has annual cash inflows of $4,200, $5,300, $6,100, and $7,400, and a discount rate of 14 percent. If the initial cost is $7,000, the discounted payback period for these cash flows is ________ years. If the initial cost is $10,000, the discounted payback period for these cash flows is_______years. If the initial cost is $13,000, the discounted payback period for these cash flows is_______years. (Round your answers to 2 decimal places. (e.g., 32.16))