Construct 4 seaborn bar graphs from these data: 1) df1['city'].value_counts() 2) df2['hotel'].value_counts() 3) df2['date'].value_counts() 4) df2['rating'].value_counts()

import seaborn as sns
import matplotlib.pyplot as plt

def bar_graph(data):
  plt.figure(figsize=(18, 6))
  sns.barplot(data.index, data.values, alpha=0.8)
  plt.title(str(data.name))
  plt.ylabel('Count', fontsize=12)
  plt.xlabel('Name', fontsize=12)
  plt.show()