$3.$ In both cases, add the eight column which stores the body mass indices of the participants.

$4.$ On a single plot, draw two histograms: for male BMIs $($top subfigure$)$ and for female BMIs

$($bottom subfigure$)$ one below another. Set the number of histogram bins to $20.$ Use matplotlib.

pyplot.subplot to create two subplots in one figure. Call matplotlib.pyplot.xlim

to make the x$-$axis limits identical for both subfigures $($work out the appropriate limits yourself$).$

For example: