A semiannual pay, noncallable, $$1,000$ par value, $3\mathrm{.}875\%$ coupon, $9-$year bond is currently priced at $105.$ as a percent of par. What is the bond's yield to maturity?

$3\mathrm{.}23\%$

$5\mathrm{.}42\%$

$2\mathrm{.}71\%$

$1\mathrm{.}62\%$