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$6$ Pulen carried out a survey of the number of books that people in his class owned. Here are his results.$\newline$\begin{tabular}{|c|c|}$\newline$\hline Number of books & Frequency \\$\newline$\hline $0-4$ & $11$ \\$\newline$\hline $5-9$ & $9$ \\$\newline$\hline $10-14$ & $4$ \\$\newline$\hline $15-19$ & $2$ \\$\newline$\hline $20-24$ & $3$ \\$\newline$\hline $25-29$ & $2$ \\$\newline$\hline$\newline$\end{tabular}$\newline$a What is the modal class?$\newline$b Copy the axes and complete the bar chart for the data. Give your chart a title.