I wanna Answers of PYTHON EXPERTS and please if you cant do it fully dont post anything

Define what a reference to an object means in the context of Python programming and explain what using a reference entails. You may wish to provide examples to make your point clearer, but make sure you describe the idea first. So This question was also about the fundamental concept of programming, regarding references to objects/variable Which object-oriented programming concept is employed as a code reuse mechanism? Name this concept and describe it. This question did NOT ask for the explanation of what code reuse is. It asked about the name of the OOP concept that provides for. codeand how that concept allows for code reuse. Explain what a decorator is in the context of Python. Describe at least one advantageof using decorators. At least two advantage not one Explain what the singleton pattern is. Explain if this pattern is necessary in the context of Python object-oriented programming and how it may be implemented in Python