Carina Grady

Results 2 issues of Carina Grady

It appears that 'figsize' is an unrecognized argument. ![image](https://user-images.githubusercontent.com/117423635/206322902-9974ca21-d877-43cf-a312-562353d805b3.png) 'dpi' gives similar error.

Made following changes to simplify code for tutorial: - before: berri_bikes.loc[:,'weekday'] --> after: berri_bikes['weekday'] - before: berri_bikes.groupby('weekday').aggregate(sum) --> after: berri_bikes.groupby('weekday').sum()