Great work implementing two big changes with little time!
Good discussion of the new features in the writeup.
You could have elaborated more on what you would have done differently and
what challenges you faced.
Your histogram has a binning issue. When the age slider range is changed,
there are gaps in the histogram.
If you would have had more time to work with the new two plot layout, you
could have limited the width or increased the height to make the plots look
less stretched out.
Great!