Visualizing USA Medal Counts by Edition: Line Plot

Your job in this exercise is to visualize the medal counts by 'Edition' for the USA. The DataFrame has been pre-loaded for you as medals.

100 XP

Create a DataFrame usa with data only for the USA.
Group usa such that ['Edition', 'Medal'] is the index. Aggregate the count over 'Athlete'.
Use .unstack() with level='Medal' to reshape the DataFrame usa_medals_by_year.
Construct a line plot from the final DataFrame usa_medals_by_year. This has been done for you, so hit 'Submit Answer' to see the plot!