List the classes that would be involved in the use cases and decide which class should be responsible for collaborating with the other classes for the use case Record a traffic ticket. Consider some possibilities: A Driver object should be responsible for recording his/her ticket, the Officer object should be responsible for recording the ticket that he or she writes, and a Ticket object should be responsible for recording itself.

Draw the following Class Structure as a (class digram):   1. NotificationSystem: This is the main class that manages the notification system. It has the following attributes and methods: - Attributes:   - users: a list of User objects representing all the users registered in the system   - tweets: a list of Tweet objects representing all the tweets posted in the system - Methods:   - register_user(user): adds a new user to the system   - post_tweet(user, message): posts a new tweet on behalf of a user   - get_timeline(user): returns a list of tweets from all users that the specified user follows   - get_mentions(user): returns a list of tweets that mention the specified user   2. User: This class represents a user in the system. It has the following attributes and methods: - Attributes:   - username: a string representing the username of the user   - followers: a list of User objects representing all users who follow this user   - following: a list of User objects representing all…

Implement a nested class composition relationship between any two class types from the following list: Advisor Вook Classroom Department Friend Grade School Student Teacher Tutor Write all necessary code for both classes to demonstrate a nested composition relationship including the following: a. one encapsulated data member for each class b. inline default constructor using constructor delegation for each class c. inline one-parameter constructor for each class d. inline accessors for all data members e. inline mutators for all data members

1. Define a class named Randomwalker. A Randomwalker object should keep track of its (x, y) location. All walkers start at the coordinates (0, 0). When a walker is asked to move, it randomly moves either left, right, up or down. Each of these four moves should occur with equal probability. The resulting behavior is known as a "random walk." (A 2-dimensional random walk example is pictured at right.) Each Randomwal ker object should have the following public methods. You may add whatever fields or methods you feel are necessary to implement these methods: move () Instructs this random walker to randomly make one of the 4 possible moves (up, down, left, or right). getX () Returns this random walker's current x-coordinate. getY () Returns this random walker's current y-coordinate. getsters () Returns the number of steps this random walker has taken.