input: Write a python function to add two vectors element-wise.
  assert vector_addition([1, 2, 3], [4, 5, 6]) == [5, 7, 9]
  assert vector_addition([0, 0, 0], [1, 1, 1]) == [1, 1, 1]
  assert vector_addition([-1, -2, -3], [1, 2, 3]) == [0, 0, 0]
output: def vector_addition(vector1, vector2):
      return [v1 + v2 for v1, v2 in zip(vector1, vector2)]