Consider a $15-$year bond with a current price of $$931\mathrm{.}18$ with a coupon rate of $11\mathrm{.}00\%.$ What is the effective annual cost $($EAY$)$ of this bond?

$13\mathrm{.}35\%$

$6\mathrm{.}00\%$

$13\mathrm{.}84\%$

$12\mathrm{.}36\%$

$11\mathrm{.}74\%$