7 Deduce the structures from the 13C NMR data. (2)214/2=4 \begin{tabular}{|c|c|} \hline b. C10H14;16.7(CH3)22.4(CH3) \\ \hline & 127.6(CH) \\ 134.5(C) \\ 136.2(C) \\ \hline \end{tabular}