input: Write a function to add a specified integer mark to each value in a list of marks. The function should take two parameters: marks (a list) and mark (an integer). Return a new list with the added mark.
  
  def add_marks(marks, mark):
   return [m + mark for m in marks]
  
  assert add_marks([87, 56, 99, 54], 4) == [91, 60, 103, 58]
  assert add_marks([100, 95, 90], 0) == [100, 95, 90]
  assert add_marks([50, 60, 70], -5) == [45, 55, 65]
  assert add_marks([], 10) == []
output: def add_marks(marks, mark):
   return [m + mark for m in marks]