How to combine string and number

CODE

How to combine string and number

Write a python statement that combines the string "Joe warren is 52 years old" from the string " Joe warren" and the number 52 and then prints the result

>>> a="Joe warren is "

>>> b=str(52)

>>> c=" years old."

>>> d=a+b+c

>>> print(d)

Output:

Joe warren is 52 years old.