Answer:
b. 3.55 years
Explanation:
The payback period is basically the amount of time an investor needs to recover his/her initial investment.
lets assume initial investment = $1,000
when you calculate IRR, the present value of the cash flows = initial investment
the present value of an annuity for 4 years and 5% is 3.5460
$1,000 = yearly cash flow x 3.546
yearly cash flow = $1,000 / 3.546 = $282
payback period = $1,000 / 282 = 3.546 years ≈ 3.55 years