1. abstract public class Employee {2.   protected abstract double getSalesAmount();3.   public double getCommision() {4.    return getSalesAmount() * 0.15;5.   }6. }7. class Sales extends Employee {8.   /* insert method here*/ 9. }
double getSalesAmount() { return 1230.45; }
public double getSalesAmount() { return 1230.45; }
private double getSalesAmount() { return 1230.45; }
protected double getSalesAmount() { return 1230.45; }