Q$\mathrm{.}2.$ You must analyze two projects, $x$ and $Y.$ Each project costs $$10,000,$ and the firm's WACC is $12\%.$ The expected cash flows as follows:

$(30$ p$.)$

a$.$ Calculate each project's NPV$.$

b$.$ According to NPV method, which project$($s$)$ should be accepted, and why?