input: Write a function to find the median of a list of numbers using the statistics module.
  assert find_median([3, -2, 4, 7, 10, 12, 11, -4, 8]) == 7
  assert find_median([1, 2, 3, 4, 5]) == 3
  assert find_median([10, 20, 30, 40, 50, 60, 70, 80, 90]) == 50
output: import statistics
  
  def find_median(numbers):
      return statistics.median(numbers)