Grant, Incorporated, has the following mutually exclusive projects

a$.$ Calculate the payback period for each project.

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

b$.$ Based on the payback period, which project should the company accept?

c$.$ If the appropriate discount rate is $12$ percent, what is the NPV for each project?

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

d$.$ Based on the NPV$,$ which project should the company accept?