An investment project provides cash inflows of $875 per year for eight years. (Do not round intermediate calculations. Round your answers to 2 decimal places (e.g., 32.16). Enter"O" if the payback period is never) Requirement 1: What is the project payback period if the initial cost is $3,200? Payback period years Requirement 2: What is the project payback period if the initial cost is $4,600? Payback period years Requirement 3: What is the project payback period if the initial cost is $7,900? Payback period years