Q4 - Onur Yigit Arpali

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#                         
# Assumed dataset file in same directory with the script
#

import pandas as pd

df = pd.read_csv('country_vaccination_stats.csv')

df['daily_vaccinations'].fillna(df.groupby('country')['daily_vaccinations'].transform('min'), inplace=True)

df['daily_vaccinations'].fillna(0, inplace=True)