input: Write a python function to create an instance of MyClass and call its methods with given arguments.
  assert my_function().foo(1, 2) is None
  assert my_function().bar(1, 2, 3) is None
  assert my_function().fizz(1, 2, 3, 4) is None
  assert my_function().buzz(1, 2, 3, 4, 5) is None
output: class MyClass:
      def foo(self, a, b):
          pass
  
      def bar(self, a, b, c):
          pass
  
      def fizz(self, a, b, c, d):
          pass
  
      def buzz(self, a, b, c, d, e):
          pass
  
  def my_function():
      instance = MyClass()
      instance.foo(1, 2)
      instance.bar(1, 2, 3)
      instance.fizz(1, 2, 3, 4)
      instance.buzz(1, 2, 3, 4, 5)
      return instance