public abstract class Employee {

private String firstName;

private String lastName;

private int age;

public Employee(String firstName, String lastName, int age) {

this.firstName = firstName;

this.lastName = lastName;

this.age = age;

}//end ctor

public String getFirstName() {

return firstName;

}

public void setFirstName(String firstName) {

this.firstName = firstName;

}

public String getLastName() {

return lastName;

}

public void setLastName(String lastName) {

this.lastName = lastName;

}

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

public abstract String work();

}