An investment project provides cash inflows of $600 per year for eight years.

a.	What is the project payback period if the initial cost is $1,625? (Enter 0 if the project never pays back. Round your answer to 2 decimal places, e.g., 32.16.)
b.	What is the project payback period if the initial cost is $3,225? (Enter 0 if the project never pays back. Round your answer to 2 decimal places, e.g., 32.16.)
c.	What is the project payback period if the initial cost is $5,100? (Enter 0 if the project never pays back. Round your answer to 2 decimal places, e.g., 32.16.)