They asked me to solve FizzBuzz.
Implement fizz_buzz(n) to return a list containing one string for every integer from 1 through n.
Use "Fizz" for multiples of 3, "Buzz" for multiples of 5, and "FizzBuzz" for multiples of both; otherwise return the number as a string.
The input is an integer n, and the output is a list of strings.
def fizz_buzz(n):