The bonds of Cora Corp. are currently selling for $($price of a bond$)$ $$800\mathrm{.}00$ and the bonds mature in $30$ years. The yield to maturity $($YTM$)$ of these bonds is $8\%.$ This is a semiannual coupon bond with a par value of $$1,000.$

The coupon rate of this bond is $\_\_\_\_\_\_\_\_$