O'Brien Ltd$.\text{'}$s outstanding bonds have a $$1,000$ par value, and they mature in $25$ years. Their nominal annual, not semiannual yield to maturity is $9\mathrm{.}25\%,$ they pay interest semiannually, and they sell at a price of $$1,125.$ What is the bond's nominal coupon interest rate?

$9\mathrm{.}28\%$

$12\mathrm{.}75\%$

$10\mathrm{.}54\%$

$8\mathrm{.}12\%$

$12\mathrm{.}44\%$