You bought an annual coupon bond last year when the bond had 20 -years to maturity. The bond's face value is $1,000, its coupon rate is 6.2%, and its YTM was 8.4\%. If you sell this bond today (right after receiving the coupon payment) and your holding period return (HPR) is 7.41%, what was the YTM at the selling time? \begin{tabular}{l} 8.70% \\ 8.50% \\ 8.25% \\ \hline 8.60% \\ \hline 8.30% \end{tabular}