- Do all exercises (full solution).

- Use the concepts of Polymorphism, Virtual and Pure Virtual functions.

- Please write this using basic C++ syntax and functions.

The following diagram illustrates the classes you will implement in this lab and their relationships. Ex 1. File Class Implement Class file as described in the UML diagram above, Notice that 1- print_details and destructor are virtual. 2-merge (File) is pure function. 3- in print_details function you must print "The file type has not been specified yet". Ex 2. Excel Class Implement Class Excel as described in the UML diagram above. Notice that: 1- Parameterized constructor that receives all data members including data members in the base class. 2- In merge you must add the number of sheets in the receiving object to the current object. 3- in print you have to print all details of object. 4- override the destructor. Ex 3. Word class Implement Class Excel as described in the UML diagram above. Notice that: 1- Parameterized constructor that receives all data members including data members in the base class. 2- In merge you must add the number of pages in the receiving object, number of topics and topics to the current object and. 3 - in print you must print all details of object. 4- override the destructor. x 4. Driver Implement a driver program to test your code. 1- Create one object of type Word and another of type Excel. 2- Create array of pointers of type File of size 2 The first pointer points to the first object and the second pointer points to the second object. 3- Create array of pointers of type File of size 5 , then ask the user to enter the type of file (Word or Excel) for each element of the array. 4- Merge any two objects of type Word then print the details. x 5. Friend function Implement the function bool find(Word\& doc, string topic) that searches in the topics in the received Word object for the received topic. Make this function a friend of class Word and modify your main0 to test this function