java多态测试，如何增加这个类

保持下述源代码不变，增加一个Student类，使得程序运行输出：

Student

Employee

代码：
class Person {

void work() {

   System.out.println("Person");

}

}

class Employee extends Person{

void work(){

   System.out.println("Employee");

}

void work2(){

   System.out.println("work2");

}

}

public class Test{

public static void main(String[] args) {

  Person p1  = new Student();

   personWork(p1);

   Person p2  = new Employee();

   personWork(p2);

}

static void personWork(Person p) {

   p.work();

}

}

class Student extends Person{
void work(){

   System.out.println("Student");
}
}