What is the Macaulay Duration of a bond with a face value of $$1,000,$ a maturity of years, and a coupon of $4\mathrm{.}25\%$ if the interest rate is $4\mathrm{.}25\%?$

$2\mathrm{.}8$

$2\mathrm{.}9$

$3\mathrm{.}0$

$3\mathrm{.}1$