Consider the following cash flows of two mutually exclusive projects for Tokyo Rubber

Company. Assume the discount rate for both projects is $10$ percent.

a$.$ What is the payback period for both projects? $($Do not round intermediate

calculations. Round your answers to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

b$.$ What is the NPV for both projects? $($Do not round intermediate calculations. Round

your answers to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$ What is the IRR for both projects? Calculate the incremental IRR for the cash flows.