An investment project provides cash inflows of $1,250 per year for eight years. (Do not round intermediate calculations. Enter 0 if the project never pays back. Round your answers to 2 decimal places (e.g., 32.16).) Requirement 1: What is the project payback period if the initial cost is $4,050? Requirement 2: What is the project payback period if the initial cost is $5,100? Requirement 3: What is the project payback period if the initial cost is $11,000