Describe the data structures and algorithms you would use to design a program that keeps track of checked-out books for a library. The system should be able to: 1) Check out books for a member who has a library card, 2) Process book returns, 3) Find all books that are overdue and identify who has them checked out, and 4) Find all books that will be due tomorrow. Note: New releases and popular books have shorter checkout periods than normal books.