Explain the difference between nested states and concurrent states. Draw a state diagram for following problem statement. Librarians categorize the library books into loanable and non-loanable books. The non-loanable books are the reference books. The loanable books are the non- reference books. After cataloguing the books, the books are available for loan. Students who borrow the library books should return them back before the due date. Books that are 12 months over the due date would be considered as a lost state. However, if those books are found in the future, they must be returned back to the library. When the books are found not required in the library or have been damaged, the book would be disposed