Solve the fizz buzz coding question.
Implement fizz_buzz(n), returning a list of strings for the integers from 1 through n. Replace multiples of 3 with "Fizz", multiples of 5 with "Buzz", and multiples of both with "FizzBuzz"; otherwise return the number as a string. Examples: n = 3 returns ["1", "2", "Fizz"], and n = 15 ends with "FizzBuzz".
def fizz_buzz(n):