What does polymorphism mean? Give an example. Explain how an activity diagram helps us to understand the behavior of the system. What is the significance of Sequence Diagram? Explain with the Help of Example. Explain the difference between Use case diagram and class diagram. Briefly describe all the relationships with notations What does polymorphism mean? Give an example. Explain how an activity diagram helps us to understand the behavior of the system. What is the significance of Sequence Diagram? Explain with the Help of Example. Explain the difference between Use case diagram and class diagram. Briefly describe all the relationships with notations