How to do in excel: $5$ s $\mathrm{.}12$ An investment project provides cash inflows of $$2,500$ per year for live years.

What is the payback period if the project requires $$4,000$ at the beginning of the

project?

$($a$)0\mathrm{.}8$ years

$($b$)1\mathrm{.}6$ years

$($c$)1\mathrm{.}8$ years

$($d$)2\mathrm{.}0$ years