public class Bicycle implement Vehicle {
private int speed;
private int gear;
public Bicycle (int speed, int gear){
        this.speed = speed;
this.gear = gear;
}
public String toString(){
        return “Speed: ” + speed + “,” + “Gear:”+ gear;
}
public void changeGear(int a){

        this.gear = a;

}
public void speedUp (int a){

        this.speed += a;

}
public void applyBrakes (int a){

        this.speed -= a;

}
}