// A class to represent employees in general (20-page manual).
public class Marketer extends Employee {
    // overrides the version from Employee class.
    public double getSalary() {
        return 10000 + super.getSalary();  // call the version from Employee
    }
    
    // The Marketer's unique behavior.
    public void advertise() {
        System.out.println("Act now, while supplies last!");
    }
}