11 A library needs to frequently search books in its database for customers. The library keeps a track of the categories of the books for efficient search. For example, the two main categories are children's book and adults books. After that the books are further divided by topics (religion, politics, history, etc). Think of a data structure that can be ideally used to store the books' information. The information would include the category, topic, title and ISBN number for each book Implement the insert and search functions for this data structure in C++. The insert and search function should take arguments from the user Good Luck