3. Your task is to create a library manager as a menu driven console application. The system should have the following functionalities in their menu: i. Add books ii. Remove books iii. Add membership iv. Remove membership v. Rent book vi. List books vii. List members viii. Exit You need to create separate files to store information of books, members, book rentals. When the system starts, it should import all contents of the file into the system, if the files are not empty. All-important fields should be checked for empty or incorrect format. Example, name, DOB, etc. should not be empty. Phone numbers should be standard format, etc. In addition to this, you may add any other related functionality as well. Create appropriate functions for the functionalities.

Also Please explain each line of code.