Calculate the annual Macaulay duration $(D_{\text{m}\text{a}\text{c}})$ of a bond with a $7\mathrm{.}50$ percent coupon, a $5-$year maturity with a yield to maturity of $2\mathrm{.}57,$ and face value of $$1000.$ Interest is paid annually. $[$Hint: don't forget to compute the current price of the bond.$]$