Challenge 2 is easier and makes more sense to do it first. Challenge 1 is probably too hard as a first challenge - ideally this would be clarified with more hints about how to approach it, or split up into two parts ('first modify year_to_csv, then modify create_csvs_by_year).
Challenge 2 is easier and makes more sense to do it first. Challenge 1 is probably too hard as a first challenge - ideally this would be clarified with more hints about how to approach it, or split up into two parts ('first modify
year_to_csv, then modifycreate_csvs_by_year).