what is the yield of each of the following bonds, if interest (coupon) is paid semi annually?

\begin{tabular}{|c|c|c|c|c|} \hline Par Value & Coupon Rate & \begin{tabular}{c} Years to \\ Maturity \end{tabular} & \begin{tabular}{c} Yield to \\ Maturity \end{tabular} & Price \\ \hline$5,000.00 & 6% & 15 & ? & $4,540.00 \\ \hline$5,000.00 & 9% & 5 & ? & $5,870.00 \\ \hline$1,000.00 & 7% & 30 & ? & $710.00 \\ \hline$5,000.00 & 8% & 10 & ? & $5,700.00 \\ \hline \end{tabular}