A firm with a 9.5 percent cost of capital is considering a project for this years capital budget. The projects expected after-tax cash flows are as follows:

Year:	0	1	2	3	4
Cash flow:	-$15,000	$5,300	$5,300	$5,100	$6,600

Calculate the projects payback period.

I know the answer is 2.86 years but may I know how to do it, step-by-step on the calculator? Thank you.