The context (social network ), You should write a code on java language by using following questions.

1. Define 5 classes/interfaces/abstract classes you can have there. Only enlist them.
2. Implement 1 class from question 1 - fields/methods/get set/ constructors/equals/toString/clone
3. Show inheritance examples and overriding/overloading of any method you like
4. Give example of runtime polymorphism.
5. Implement Comparable interface and write 1 comparator. For what will you use it?
6. Give 1 example for dependency, aggregation, composition, generalization, realization associations
7. Apply________ design patterns. Describe situations where you can use them.
8. Which collections will you use there and for what?
9. Draw UML class diagram of the system