Series (2 Marks Questions)

1. What is series? Explain with the help of an example.
2. What will be the output of the following code:
   

   import pandas as pd
   a = pd.Series([1,2,3,4,5], index = ['A','B','C','D','E',] )
   print(a)
   print(a-1)
   print(a gt=3)
   a['A'] = 'Z'
   print(a)
   

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