code: def adjust_bounding_box(bbox):
      
      for i in range(0, 4):
          if i in bounding_box:
              bbox[i] = bounding_box[i]
          else:
              bbox[i] += delta_bounding_box[i]
      return bbox
docs: Adjust the bounding box as specified by user.
      Returns the adjusted bounding box.
  
      - bbox: Bounding box computed from the canvas drawings.
      It must be a four-tuple of numbers.