Public Boolean on; public Light Bulb () {on = False;} public void change() {on = ion;} public Boolean isOn() {return on;} public String toString() {String result = "Light is"; if(on) return result + "on" else return result + "off"} public static void main (String [] args) {LightBulb.change();//a LightBulb 1t = new LightBulb(40)l//b LightBulb b1b = new LightBulb();//c System.out.println(b1b);//d on = b1b.isOn();//e if(b1b.isOn == true)//f change();//g else if (isOff(b1b))//h System.out.println(b1b.change());//i LightBulb = b1b.change();//j}}