Hi please help!

An investment project has annual cash inflows of $5,200,$3,000,$4,300, and $3,500, for the next four years, respectively. The discount rate is 13 percent. a. What is the discounted payback period for these cash flows if the initial cost is $4,900 ? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) b. What is the discounted payback period for these cash flows if the initial cost is $7,000 ? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) c. What is the discounted payback period for these cash flows if the initial cost is $10,000 ? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.)