The Heights (In Inches) of 30 Mechanics Are Listed Below $\begin{array} { l l l l l l l l l l } 70 & 72 & 71 & 70 & 69 & 73 & 69 & 68 & 70 & 71 \end{array}$

The heights (in inches) of 30 mechanics are listed below. Construct a stem-and-leaf plot for the data. $\begin{array} { l l l l l l l l l l } 70 & 72 & 71 & 70 & 69 & 73 & 69 & 68 & 70 & 71 \end{array}$
$\begin{array} { l l l l l l l l l l } 67 & 71 & 70 & 74 & 69 & 68 & 71 & 71 & 71 & 72 \end{array}$
$\begin{array} { l l l l l l l l l l } 69 & 71 & 68 & 67 & 73 & 74 & 70 & 71 & 69 & 68 \end{array}$