Define a class named Document that contains an instance variable of type string named text that stores any textual content for the document. Include methods to set and get this text value. Create method named printDocument that prints the text field. Include appropriate constructor(s).

Next, define a class for email that is derived from Document and includes instance variables for the sender, recipient, and title for an email message. Implement appropriate accessor and mutator methods. The body of the email message should be stored in the inherited variable text. Define the printEmail method to print the text and other appropiate fields. Include appropriate constructor(s). Similarly, define a class for File that is derived from Document and includes an instance variable for the pathname. The textual contents of the file should be stored in the inherited variable text. Define the printFile method to concatenate and print all text appropriate fields. Include appropriate constructor(s). Finally, create several sample objects of type Email and File in your main function. (Please, the answer should be in C++ language).