What is the output for the given python code?
import pandas as pd
import numpy as np
d = {'Name':pd.Series(['Tom','James','Ricky','Vin']),
'Age':pd.Series([25,26,25,23]),
'Rating':pd.Series([4.23,3.24,3.98, 4])}
df = pd.DataFrame(d)
x=df.Age.sum()
print(x)
1
99
2
4
3
98
4
3