Hey, I would be grateful for assistance with part c) of this question. I have included my code for part a) and b) .

Note each classes developed in this question must have get and set methods for each field and any other constructors and methods you deem appropriate.

a) Create a CalculateGrade interface which specifies two methods

i) calculateGradeAverage

ii) assignGrade

b) Design a Class which represents a Student which implements CalculateGrade. It is to have the following fields, Name, Student Number, Course, Current Year , Registration Status, An Arraylist of marks for the 10 topics the student is studying as part of their Course. You are to implement i) calculateGradeAverage to calculate the average of all the subject marks recorded for the student and ii) assignGrade to output a corresponding grade for the calculated grade average according to the scheme 

A grade for a grade average over 80

B grade for a grade average greater than or equal to 70 and less than 80

C grade for a grade average greater than or equal to 60 and less than 70

D grade for a grade average greater than or equal to 50 and less than 60

E grade for a grade average greater than or equal to 40 and less than 50

F grade for a grade average less than 40

c) Design an Undergraduate subclass of the Student class. It is to have the following extra fields: stream which indicates the particular stream of a course a student is following e.g. data Analytics in a Computer Science course, and a field representing their Final year project topic. You are to have a method that works out the initials of an Undergraduate and displays these. You are also to have a method which displays a warning for any Undergraduate whose grade average is less than a D grade.

//My Java code for parts a) and b)

CalculateGrade.java

public interface CalculateGrade {

public double calculateGradeAverage();

public void assignGrade();

}

Student.java

import java.util.ArrayList;

public class Student implements CalculateGrade{

// Data members

private String name;

private int studentNumber;

private String course;

private int year;

private String status;

private ArrayList marks;

// Constructor to initialize data members

public Student(String name, int studentNumber, String course, int year, String status, ArrayList marks) {

this.name = name;

this.studentNumber = studentNumber;

this.course = course;

this.year = year;

this.status = status;

this.marks = marks;

}

// Getter and setter methods

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getStudentNumber() {

return studentNumber;

}

public void setStudentNumber(int studentNumber) {

this.studentNumber = studentNumber;

}

public String getCourse() {

return course;

}

public void setCourse(String course) {

this.course = course;

}

public int getYear() {

return year;

}

public void setYear(int year) {

this.year = year;

}

public String getStatus() {

return status;

}

public void setStatus(String status) {

this.status = status;

}

public ArrayList getMarks() {

return marks;

}

public void setMarks(ArrayList marks) {

this.marks = marks;

}

@Override

public double calculateGradeAverage() {

double average = 0;

// Iterate over marks list

// Add marks to variable average

for(Integer m:marks) {

average+=m;

}

// Divide average by size of marks list

// Return average

average = average/marks.size();

return average;

}

@Override

public void assignGrade() {

char grade;

// Call function and get average

// Set grade value from the given conditions

double average = calculateGradeAverage();

if(average>=80) {

grade = 'A';

}else if(average>=70 & average<80) {

grade = 'B';

}else if(average>=60 & average<70) {

grade = 'C';

}else if(average>=50 & average<60) {

grade = 'D';

}else if(average>=40 & average<50) {

grade = 'E';

}else {

grade = 'F';

}

System.out.println("Average = "+average);

System.out.println("Grade = "+grade);

}

// Print student details

public String toString() {

return "Name: "+this.name+

" Student Number: "+this.studentNumber+

" Course: "+this.course+

" Year: "+this.year+

" Status: "+this.status+

" Marks: "+this.marks;

}

}

Q.java

import java.util.ArrayList;

import java.util.Arrays;

public class Q {

public static void main(String[] args) {

// Two samples cases

Student student1 = new Student("Nancy",101,"CSE",2018,"Successful",

new ArrayList(Arrays.asList(90,70,90,85,70,75,99,67,80,85)));

System.out.println(student1);

student1.assignGrade();

System.out.println();

Student student2 = new Student("Maddy",102,"CSE",2018,"Successful",

new ArrayList(Arrays.asList(60,79,69,45,74,75,60,67,80,85)));

System.out.println(student2);

student2.assignGrade();

}

}