An investment project provides cash inflows of $$1,400$ per year for eight years.

What is the project payback period if the initial cost is $$4,350?$

Note: Do not round intermediate calculations and round your answer to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

What is the project payback period if the initial cost is $$5,400?$

Note: Do not round intermediate calculations and round your answer to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

What is the project payback period if the initial cost is $$12,200?$

Note: Enter $0$ if the project never pays back. Do not round intermediate calculations and round your answer to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$