C++. need your help to solve one of the problems from the book: Malik C++ Programming, ISBN: XXXXXXXXXXOnline Address Book Revised (Exercise 1 from chapter 16). Program Exercise 5 in Chapter 11 could...

C++. need your help to solve one of the problems from the book: Malik C++ Programming, ISBN: 9781337117562.Online Address Book Revised (Exercise 1 from chapter 16). Program Exercise 5 in Chapter 11 could handle a maximum of only 500 entries. Using linked lists, redo the program to handle as many entries as required. Add the following operations to your program:Add or delete a new entry from the address book.Allow the user to save the data in the address book to a file.I started the revision of the program, so the file attached contains a partial solution. please help me to modify it so the program functions as it is supposed to be. if you need the source code forExercise 5 in Chapter 11, I can provide it