input: Write a python function to add 5 to each element in an array using numpy.
  assert np.array_equal(add_five_to_array([1, 2, 3]), np.array([6, 7, 8]))
  assert np.array_equal(add_five_to_array([10, 20, 30]), np.array([15, 25, 35]))
  assert np.array_equal(add_five_to_array([-5, 0, 5]), np.array([0, 5, 10]))
output: import numpy as np
  
  def add_five_to_array(arr):
      return np.array(arr) + 5