Q3: Continue of previous question (20pt) 1. Copy the previous program to a new file. 2. Convert Vehicle to abstract class. 3. Override output function of Car and Boat class. Use following main() to test your function. int main(){ Vehicle *a; a = new Car("Honda", 2000); a->output(); // Brand:Honda Weight: 2000 a = new Boat("Baja", 100); a->output(); // Brand:Baja hullLength: 100 } Output from main: Brand: Honda Weight: 2000 Brand: Baja hullLength: 100

my code is displayed below, just need help with this question in c++.

#include <iostream>
using namespace std;

class Vehicle{
private:
  string *brand;
public:
  Vehicle(){
    brand = new string;
    *brand = "TBD";
  }
  Vehicle(string b){
    brand = new string;
    *brand = b;
  }
  void output(){
    cout << "Brand: " << *brand << endl;
  }
  void setBrand(string b){
    *brand = b;
  }
  string getBrand(){return *brand;}
};

class Car:public Vehicle{
private:
  int *weight;
public:
  Car():Vehicle(){
    weight = new int;
    *weight = 0;
  }
  Car(string b, int w):Vehicle(b){
    weight = new int;
    *weight = w;
  }
  void output(){
    cout << "Brand: " << getBrand() << " Weight: " << *weight << endl;
  }
  void setWeight(int w){
    *weight = w;
  }
  int getWeight(){return *weight;}
};

class Boat:public Vehicle{
private:
  int *hullLength;
public:
  Boat():Vehicle(){
    hullLength = new int;
    *hullLength = 0;
  }
  Boat(string b, int h):Vehicle(b){
    hullLength = new int;
    *hullLength = h;
  }
  void output(){
    cout << "Brand: " << getBrand() << " Hull Length: " << *hullLength << endl;
  }
  void sethullLength(int h){
    *hullLength = h;
  }
  int gethullLength(){return *hullLength;}
};