Write a scenario for purchasing a plane ticket and provide a solution $($a UML diagram$).$ choose any ONE of the four different types of UML diagrams: Activity Diagrams, Class Diagrams, State Chart Diagrams and Use Case Diagrams. Make sure that scenario text is neither too simplistic nor too complex. this scenario should include user actions and the responses$/$functionality of a airline booking system. If it is a class diagram, focus on the number of different classes, their attributes, operations and the relationships between the classes. If it is an activity diagram, focus on the user activities when ordering a ticket via an online application. If it is a state chart diagram, make sure that model different states of a single object $($e$.$g$.$ a train ticket$)$ and the transitions between the states