An investment project provides cash inflows of $630 per year for eight years. What is the project payback period if the initial cost is $1,775? (Do not round intermediate calculations. Enter O if the project never pays back. Round your answer to 2 decimal places, e.g., 32.16.) Payback period years What is the project payback period if the initial cost is $3,450? (Do not round intermediate calculations. Enter O if the project never pays back. Round your answer to 2 decimal places, e.g., 32.16.) Payback period years What is the project payback period if the initial cost is $5,200? (Do not round intermediate calculations. Enter O if the project never pays back. Round your answer to 2 decimal places, e.g., 32.16.) Payback periodyears