An investment project has annual cash inflows of $3,300 $4,200 $5,400, and $4,600. for the next four years, respectively. The discount rate is 15 percent. a. What is the discounted payback period for these cash flows if the initial cost is $6,000? (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 $8.1007 (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 $11.100? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g. 32.16.) vears Discounted payback period b. Discounted payback period c. Discounted payback period vears years