All techniques with NPV profile$-$Mutually exclusive projects

Projects A and $B,$ of equal risk, are alternatives for expanding Rosa Company's capacity. The firm's cost of capital is $15\%.$ The cash flows for each project are shown in the following table:

a$.$ Calculate each project's payback period.

b$.$ Calculate the net present value $($NPV$)$ for each project.

c$.$ Calculate the internal rate of return $($IRR$)$ for each project.

d$.$ Indicate which project you would recommend.

Please do the calculation for a$,$b$,$c$,$d