You are given the below Java code: public class Student{ public String name; public double gpa; 1 2. 4 eoverride public String toString () { return "Stud ent"; 6. public class GraduateStudent extends...

Extracted text: You are given the below Java code: public class Student{ public String name; public double gpa; 1 2. 4 eoverride public String toString () { return "Stud ent"; 6. public class GraduateStudent extends Student{ public int age; eoverr ide 10 11 12 public String toString() { 13 return "Graduate Student"; 14 15 16 public class MainClass{ public static void ma in(String[] args){ new GraduateStudent (): 17 18 Student A - 19 GraduateStudent B - new GraduateStudent () ; System.out.println (A.toString()); System.out.println(B.toString () ); 20 21 22 23 a) What will be printed out by line 20 in the above code? b) What will be printed out by line 21 in the above code? You are given the below Java code: public class Student{ public String name; 1: 2: 3: 4: 5: 6: 7: 8: 9: 10: } 11: 12: public class Mainclass{ 13: 14: 15: 16: 17: 18: 19: 20: 21: 22: } public class Graduatestudent extends Student{ public int age; public void printName (){ system. out. printIn(name); public static void main(String[] args){ student A - new Graduatestudent(); student B - new Student (); Graduatestudent c - (Graduate student) A; Graduatestudent D - (Graduate Student) B; Graduatestudent E - new Graduatestudent (); A. printName (); E. printName (); c) Which line in the above code would result in a ClassCastException?. d) Which line in the above code would generate a compile error