In project2, you defined the following two classe // ShoppingCart.h template class ShoppingCart:public Bag \{ private: double totalPrice; public: ShoppingCart(); double getTotalPrice()const; bool remove(const ItemType\& anEntry); bool add(const ItemType\& newEntry); \}; // Item.h class Item \{ private: std::string name; // name of the item int quantity; // quantity of the item private: std::string name; // name of the item int quantity; // quantity of the item float price; // price of the item public: Item(); Item(std::string name, float price, int qtty); void setName(std::string name); void setQuatity(int qtty); void setPrice(float price); std::string getName() const; int getQuantity() const; float getPrice() const; friend std::istream \&operator>>(std::istream \&ins, Item \&target); \}; std::ostream \&operator== ). Let's redefine the add member function to avoid duplicated items by only changing the quantity if the new item already exists. In above example, after adding the new item "T-shirt $19.993 ", the shopping cart should look like this: To implement this new add function, first check if this newEntry is in the cart, and then perform the following two logic steps according to the checked results: 1. if this newEntry is not a duplicated item, simply add it to the cart. Then update the totalPrice; 2. otherwise, find the duplicated item from the cart and add its quantity to the new newEntry's quantity. Then remove the duplicated item from the cart; add this new add function, first check if this newentry is in the cart, and then perform the following two logic steps according to the checked results: 1. If this newEntry is not a duplicated item, simply add it to the cart. Then update the totalPrice; 2. otherwise, find the duplicated item from the cart and add its quantity to the new newEntry's quantity. Then remove the duplicated item from the cart; add the modified new Entry to the cart; and update the totalPrice. Answer the following two questions about redefining the add function. Question 6 (5 points) For step 1), which of the following implementations is correct? a) if(!contains(newEntry) {boolflag=add(newEntry);if(flag) totalPrice+=newEntry.getQy(nntity()*newEntry.getPrice); b) if(!contains(newEntry)) bool flag = Bag::add(newEntry); if(flag) totalPrice = 2 total Price; \} c) If(!contains(newEntry)) { bool flag = add(newEntry); if(flag) totalPrice+= newEntry.getPrice(); d) If(!contains(newEntry)) \{ bool flag = Bag :: add(newEntry); if(flag) bool flag = Bag>::add( new Entry); if(flag) totalPrice += newEntry.getQuantity()**newEntry.getPrice(); \} Question 7 (5 points) For step 2), which of the following implementations is correct? a) int numltems = getCurrentSize(); int q_current; int q_new = newEntry.getQuantity(); for(int i=0;i::add( new Entry); totalPrice += q_new new Entry.getPrice(); b) vector> items = toVector(); int numltems = items.size(); int q_current; int q_new = newEntry.quantity; for(int i=0;i items = toVector(); int numltems = items.size(); int q_current; int q_new = newEntry.quantity; for(int i=0;i items = toVector(); int numltems = items.size(); int q_current; int q_new = newEntry.getQuantity(); for(int i=0; i items = toVector(); int numltems = items.size(); int q_current; int q_new = newEntry.getQuantity(); for(int i=0;i \& cart) \{ int numltem = cart.getCurrentSize(); for(int i=0; i[i] \& cart) \{ int numltem = cart.getCurrentSize(): b) template> \& cart) \{ int numltem = cart. getCurrentSize(); for(int i=0;i& cart) vector items = cart.toVector(); int numltem = items.size(); for(int i=0;i