PublicTranport and PrivateTranport are subclasses of Transport.Car and Bike are sub-classes or derived classes of PrivateTransport .PMT and Auto are sub-classes or derived classes of Public Transport.Assume sutaible mehods and veriables

class Transport{

String name;

Transport(String name){

this.name = name;

}

}

class PublicTransport extends Transport{

int capacity;

PublicTransport(int c, String name){

super(name);

this.capacity = c;

}

void publicTransport() {

System.out.println(super.name+" can carry many passengers");

}

}

class PrivateTransport extends Transport{

int capacity;

PrivateTransport(int c, String name){

super(name);

this.capacity = c;

}

void privateTransport() {

System.out.println(super.name+" can carry less passengers");

}

}

class PMT extends PublicTransport{

PMT(){

super(30,"PMT");

}

public void capacity() {

System.out.println("PMT capacity is "+capacity);

}

}

class Auto extends PublicTransport{

Auto(){

super(4,"Auto");

}

public void capacity() {

System.out.println("Auto capacity is "+super.capacity);

}

}

class Car extends PrivateTransport{

Car(){

super(6,"Car");

}

public void capacity() {

System.out.println("Car capacity is "+super.capacity);

}

}

class Bike extends PrivateTransport{

Bike(){

super(2,"Bike");

}

public void capacity() {

System.out.println("Bike capacity is "+super.capacity);

}

}

public class travel {

public static void main(String[] args) {

Car c = new Car();

c.capacity();

Bike b = new Bike();

b.capacity();

PMT p = new PMT();

p.capacity();

Auto a = new Auto();

a.capacity();

}

}