Create a class Student which store the name and roll no. of a student. Create another class Marks which inherits class Student and store the marks of 3 subjects. Create Class Result which inherits class Marks and store the information of a student and display name, roll and total marks of a student.

import java.util.Scanner;
class Student {
 String name;
 int roll;
}
class Marks extends Student {
 int m1,m2,m3;
}
class Result extends Marks {
 int total;
 void input() {
  Scanner s=new Scanner(System.in);
  System.out.print("Enter Name: ");
  name = s.nextLine();
  System.out.print("Enter Roll: ");
  roll = Integer.parseInt(s.nextLine());
  System.out.print("Enter Marks1: ");
  m1 = Integer.parseInt(s.nextLine());
  System.out.print("Enter Marks2: ");
  m2 = Integer.parseInt(s.nextLine());
  System.out.print("Enter Marks3: ");
  m3 = Integer.parseInt(s.nextLine());
 }
 void display() {
  total = m1+m2+m3;
  System.out.println("Name- "+name);
  System.out.println("Roll- "+roll);
  System.out.println("Total- "+total); 
 }
}
class Test {
 public static void main(String[] a)
 {
  Result r = new Result();
  r.input();
  r.display();
 }
}