The following diagram illustrates the classes you will implement in this lab and their relationships.

Ex $1.$ File Class

Implement the Class file as described in the UML diagram above; notice that:

$1-$ print$\_$details and destructor are virtual.

$2-$ merge $($File$)$ is a pure function.

$3-$ in the 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 the details of the 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 and the number of topics to the current object.

$3-$ in print, you must print all details of the object.

$4-$ override the destructor.

Ex $4.$ Driver

Implement a driver program to test your code.

$1-$ Create one object of type Word and another of type Excel.

$2-$ Create an 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 an array of pointers of type File of size $5,$ then ask the user to enter the file type $($Word or Excel$)$ for each array element.

$4-$ Merge any two objects of type Word, then print the details.

Ex $5.$ Friend function

Implement the function bool find$($Word& doc, string topic$)$ that searches the topics in the received Word object for the received topic.

Make this function a friend of class Word and modify your main$()$ to test this function