A Directory has zero or more Files. A Directory also has zero or more Directories   (b) A Car has 1 Engine, 1 BrakeSystem, and 4 Wheels

Use the example of a component that implements an abstract data type, like as a stack or a list, to demonstrate why it is frequently required to expand and adapt components in order to reuse them.

Consider that a system has two entities, Student and Course. The student has the following properties:student name, number, SSN and GPA. Similarly, the course has the following properties: course name,course number, credit hours and a set of students who are currently registering on the course.Implement the above system taking into account the following requirements:1. In course, the number of students that are registering this course is decided at the time wheninstantiating the course object.2. Assume that student1 and student2 are two objects of type student, write a code that enablesyou to write: if (student1.isequal (student2)). Where student1, student12 arestudent objects. The statement is true if the objects have the same GPA and credit hours.3. Write a getStudentpByName method in class course that takes a student name and returnsa list of all students who share the same name.4. Write a getStudentByGPA method in class course that takes a GPA and returns a list ofStudents in that…

Subject: OOAD