Monthly exercise with one line per person

The wide-format DataFrame by_person holds how many hours three students exercised each month during one semester. Each person has their own column. Use melt() to turn this DataFrame into a long-format DataFrame with the columns month, person, and hours.

Draw the new DataFrame with seaborn's lineplot(). Put the month column on the x-axis and the hours column on the y-axis, and use hue to draw a separate line for each person. The lines and the legend follow the column order of the DataFrame (Mina, Joon, Sora), so you do not need to reorder them.

Set the chart title to Monthly exercise by person, the x-axis label to Month, the y-axis label to Exercise (hours), and the legend title to Person.

Starter code

import pandas as pd
import seaborn as sns
import matplotlib.pyplot as plt

months = ["Sep", "Oct", "Nov", "Dec"]
mina = [12, 9, 15, 14]
joon = [6, 8, 7, 10]
sora = [3, 5, 4, 7]
by_person = pd.DataFrame({"month": months, "Mina": mina, "Joon": joon, "Sora": sora})

# Write your code here