input: Write a function to demonstrate usage of *args and **kwargs by printing arguments and keyword arguments.
  assert my_func(1, 2, firstname='John', lastname='Doe')==None
  assert my_func(10, 20, 30, key1='value1', key2='value2')==None
  assert my_func('apple', 'banana', color='yellow', taste='sweet')==None
output: def my_func(*args, **kwargs):
      print("Arguments:", args)
      print("Keyword Arguments:", kwargs)