input: Write a function to check if numbers in a list are even using the is_even function.
  assert check_even_numbers([1, 2, 3, 4, 5, 6])==[False, True, False, True, False, True]
  assert check_even_numbers([10, 21, 32, 43, 54])==[True, False, True, False, True]
  assert check_even_numbers([7, 8, 9, 10, 11])==[False, True, False, True, False]
output: def is_even(n):
      return n % 2 == 0
  
  def check_even_numbers(numbers):
      return [is_even(num) for num in numbers]