First, you need to design, code in Java, test and document a base class, Student. The Student class will 
have the following information, and all of these should be defined as Private:

A. A first name (given name)
B. A last name (family name/surname)
C. Student number (ID) – an integer number (of type long)
D. A date of birth (in day/month/year format – three integers) - (Create your own Date class, the 
Date class should be a separate class from this. Do NOT use the Date class from JAVA.)
The Student class will have at least the following constructors and methods:
(i) two constructors - one without any parameters (the default constructor), and one with 
parameters to give initial values to all the instance variables of Student. 
(ii) only necessary set and get methods for a valid class design. 
(iii) a reportGrade method, which you have nothing to report here, you can just print to the screen 
a message “There is no grade here.”. This method will be overridden in the respective child 
classes.
(iv) an equals method which compares two student objects and returns true if they have the same 
student number (ID), otherwise it returns false.
You may add other methods in the Student class as you see appropriate, however you will need to 
justify why those methods are required.
Design, code in Java, test and document (at least) the following classes –
• a UndergraduateStudent class, a GraduateStudent class (both derived from the Student class)
• a UndergraduateUnit class, GraduateUnit class (both derived from the Unit class specified 
below)
• and a Client class.
Assuming in this program, you allow multiple student objects to be created (i.e. arraylist of student 
objects).
For undergraduate students (UndergraduateStudent class): 
(a) Contain information of the UndergraduateUnit object (assuming that there is only one unit)
(b) Provide a reportGrade method such that it will output “U” (to identify as undergraduate student), 
the Name (first name and last name), Student number, the unit ID, the overall mark, and the final 
grade of the student. 
For graduate students (GraduateStudent class):
(a) Contain information of the GraduateUnit object (assuming that there is only one unit)
(b) Provide a reportGrade method such that it will output “G” (to identify as graduate student), the 
Name (first name and last name), Student number, enrolment type and the final grade of the 
student.
Unit class:
(a) Enrolment type: “U” for undergraduate and “G” for graduate
(b) A final grade reporting method for reporting the “NA” for not available. 
Undergraduate unit (UndergraduateUnit class):
(a) Will have the information of the unit ID (of type string; e.g. ICT167), and the level of the unit (of 
type integer; e.g. 1 for first year)
(b) There are two assignments, each marked out of a maximum of 100 marks and equally weighted. 
The marks for each assignment are recorded separately

(c) There is weekly practical work. The marks for this component are recorded as a total mark 
obtained (marked out of a maximum of 20 marks) for all practical work demonstrated during the 
semester.
(d) There is one final examination that is marked out of a maximum of 100 marks and recorded 
separately.
(e) An overall mark (to be calculated within the class)
(f) A final grade, which is a string (avoid code duplication for calculating this)
The final grade, for undergraduate students, is to be awarded on the basis of an overall mark, which is a 
number in the range 0 to 100 and is obtained by calculating the weighted average of the student's 
performance in the assessment components. The criteria for calculating the weighted average is as 
defined below: 
The two assignments together count for a total of 50% (25% each) of the final grade, the 
practical work is worth 20%, and the final exam is worth 30% of the final grade.
A grade is to be awarded for undergraduate students as follows: An overall mark of 80 or higher is an 
HD, an overall mark of 70 or higher (but less than 80) is a D, an overall mark of 60 or higher (but less 
than 70) is a C, an overall mark of 50 or higher (but less than 60) is a P, and an overall mark below 50 
is an N.
Graduate unit (GraduateUnit class):
(a) Enrolment type of the graduate student; whether the student is a Master or PhD student (of type 
string; e.g. Master or PhD)
(b) The number of years used to complete the thesis (of type integer, e.g. 3 for taking three years to 
complete).
(c) A final grade, which is a character (C for completed; N for not completed; S for suspended)