Implement DictMixin and JSONMixin for object serialization

Problem Create two mixin classes that give Python objects serialization capabilities through multiple inheritance. DictMixin — provides a method to_dict(self) that transforms the object into a dictionary. JSONMixin — provides a method to_json(self) that transforms the object into a JSON string. Rules Only attributes whose names do not start with an underscore (_) should be included in the output. to_dict must return a dict. to_json must return a JSON string. If the object…