$(10$ points$)$ Dong Hwa Inc. issues a callable $($at par$)$ ten$-$year, $6\%$ coupon bond with annual coupon payments. The bond can be called at par in two years after release or any time after that on a coupon payment date. On release, it has a price of $$107$ per $$100$ of face value. What is the yield to call of this bond when it is released?

$2$