input: Write a python function to add 5 to each element in a list.
  assert func([1, 2, 3, 4, 5]) == [6, 7, 8, 9, 10]
  assert func([10, 20, 30]) == [15, 25, 35]
  assert func([-1, 0, 1]) == [4, 5, 6]
output: def func(lst):
      return [x + 5 for x in lst]