Consider a coupon bond that has a $$1,500$ par value and a coupon rate of $4\mathrm{.}2\%.$ The bond is currently selling for $$1,620$ and has $8$ years to maturity. What is the bond$$s yield to maturity? $($Round to $2$ decimal places, and answer in $12\mathrm{.}34$ format if your answer is $12\mathrm{.}34\%)$