Tasks $|$

Identify the classes in the proposed system.

Draw a class diagram to show the structure of your classes and relationships that they may

have with one another. Your class diagram should exhibit the object$-$oriented concepts of

polymorphism and inheritance.

List possible attributes and methods for each of the classes identified above.

Design the user interfaces according to your class diagram and object$-$oriented design

principles. $5.$ Implement the classes using an object$-$oriented programming language of your

choice $($Python$/$C$++/$Java$/$C# and only object$-$oriented programming language is allowed$).$ Your

implementation should reflect the structure of your classes $($including the user interface design$)$

accordingly and exhibit the object$-$oriented concepts of polymorphism, inheritance, association

and encapsulation.

Implement the user interfaces and methods of the classes. It is not necessarily to implement the

methods in detail. It is sufficient if each method can print an output on the screen so that we know

which method is called.

Prepare at least $5$ test cases $($other than the 'login' test case sample as it is shown in the Test

Case template already$).$

Implement the driver $($main program$)$ which will test all the classes and methods declared

according to the class diagram and test according to the test cases