A $7\mathrm{.}2\%$ annual coupon, $$1,000$ par value bond with four years remaining to maturity is priced with a yield to maturity of $8\%.$ What is this bond$$s duration?

$3\mathrm{.}61$ years

$2\mathrm{.}97$ years

$3\mathrm{.}84$ years

$3\mathrm{.}15$ years