This lab practices define class, more particular, identifying the member variables, declaring and defining constructors, and other member functions. Background reading:
Please review textbook for the basics of class, and the idea of Abstract Data Type Section 10.2 and 10.3 in Savitch). This project is adapted from the Project 7 in Page 614 of Savitch book.
Requirement
Write a rational number class. Recall a rational number is composed of two integers with division indicated. The division is not carried out, it is only indicated, as in 1/2, 2/3 15/32. You should represent rational numbers using two int values, numerator and denominator
A principle of abstract data type construction is that constructors must be present to create objects with any legal values. You should provide the following three constructors
1. one (default) constructor to make rational object without any argument. The constructor sets the rational object's numerator to 0, and denominator to 1
2. one constructor with two int parameters. This constructor uses the two values to initialize the rational object's numerator and denominator respectively. If the denominator value is 0, the constructor should generate an assertion failure
3. one constructor with one int parameter. The constructor should set the rational's numerator to the given parameter, and sets the denominator to 1
You should also provide the following member functions
an input function that reads from standard input the value for the calling object. The input should be in the form of "2/3" or "27/51.
an output function that displays the calling object in the terminal. The output should also be in the form of "2/3", i. e., numberator/denominator
One setter function that sets the numerator and denominator of the calling object.
Two getter functions that return the numerator and denominator respectively.

[java] create an application called registrar that has the following classes: a. a student class that minimally stores the following data fields for a student: - name - student id number - number of credits - total grade points earned and this class should also be provides the following methods: - a constructor that initializes the name and id fields - a method that returns the student name field - a method that returns the student id field - methods to set and retrieve the total number of credits - methods to set and retrieve the total number of grade points earned. - a method that returns the gpa (grade points divided by credits) b. an instructor class that minimally stores the following data fields for an instructor: - name - faculty id number - department the following methods should be provided: - a constructor that initializes the name and id fields - methods to set and retrieve the instructor’s department. c. a course class that minimally stores the following data for a course: - name of the course- course registration code- maximum number of 35 students- instructor- number of students- students registered in the course (an array)the following methods should also be provided: - a constructor that initializes the name, registration code, and maximum number of students- methods to set and retrieve the instructor- a method to search for a student in the course; the search should be based on an id number.- a method to add a student to the course. if the course is hill, then an exception with an appropriate message should be raised (try creating your own exception class for this). also, be sure that the student is not already registered in the course. the list of students should be in the order that they registered.- a method to remove a student from the course. if the student is not found, then an exception with an appropriate message should be raised (use the same exception class mentioned a method that will allow course objects to be output to a file using object serialization- a method that will allow course objects to be read in from a file created with object serializationyou will note that the student and instructor classes described above have some commonality. create aperson class that captures this commonality and uses it as a base class for student and instructor. this class should be responsible for the name and id fields and also provide atostring method that returns a string of the form name, id. this will be the inheritedtostring method for the student and instructor classes.1. draw a uml diagram for diss application.2. implement the previous classes in java. write a main program that can serve as a test class that tests all of the methods created and demonstrates that they are working