input: Write a function to create an array of zeros using NumPy.
  assert (create_zeros_array(5) == numpy.zeros(5)).all()
  assert (create_zeros_array(10) == numpy.zeros(10)).all()
  assert (create_zeros_array(3) == numpy.zeros(3)).all()
output: import numpy as np
  
  def create_zeros_array(length):
      return np.zeros(length)