input: Write a python function to generate a 5x5 2D array with random integers between 0 and 9.
  assert len(generateArray()) == 5
  assert all(len(row) == 5 for row in generateArray())
  assert all(0 <= num <= 9 for row in generateArray() for num in row)
output: import random
  
  def generateArray():
      return [[random.randint(0, 9) for _ in range(5)] for _ in range(5)]