How do you normalize to a density in histO using R studio? "Use hist() to plot a histogram of s, normalized to be a density (so that the total area of the bars is 1, check ?hist), make sure that the number of breaks (a parameter in the hist() function) does justice to your data, as the default value is not good enough at times. Justify your choice (you can provide several figures, prior knowledge or any other convincing argument)"