An investment project provides cash inflows of $1,180 per year for eight years. (Enter O when there is no payback period. Round the answers to 2 decimal places.) a. What is the project payback period if the initial cost is $4,900? Payback period D years b. What is the project payback period if the initial cost is $7,000? Payback period D years c. What is the project payback period if the initial cost is $10,000? Payback period O years