Implement a function “fizz_buzz(num)”, which return a string where:

  • It returns "Fizz" if parameter(num) is divisible by 3.
  • It returns "Buzz" if parameter(num) is divisible by 5.
  • It returns "FizzBuzz" if parameter(num) is divisible by 3 and 5.

Return parameter(num as a string) if none of the above conditions are true.