a$.$ Calculate the payback period whitout PV for both projects. $($Do not round intermediate calculations and round your answers to $2$ decimal places, e$.$g$.,8,732\mathrm{.}16)$

b$.$ Calculate the NPV for both projects. $($Do not round intermediate calculations and round your answers to $2$ decimal places, e$.$g$.,8,732\mathrm{.}16)$

c$.$ Which project, if any, should the company accept? just write the letter.