SIMPLE FORMULA NOT EXCEL

$11\mathrm{.}24($Calculating the payback period, NPV$,$ PI$,$ and IRR$)$ Rayyan Industries is considering a project with an initial cash outlay of $120,000$ expected cash flows of $30,000$ at the end of each year for seven years. The discount rate for this project is $12$ percent.

a$.$ What are the project$$s payback and discounted payback periods? b$.$ What is the project$$s NPV$?$

c$.$ What is the project$$s PI$?$

d$.$ What is the project$$s IRR?