Exercise 1 Customers go to physical ABC Bank to do 2 main jobs; withdraw or deposit money. A cashier will help customers in these 2 jobs. Before withdrawing, the cashier needs to check the customer's balance. After withdrawing or depositing, the cashier will update the customer's balance. The receipts will be printed automatically after each process, also customers can request them for the record. Draw use case diagram for the above system. Exercise 2 Users go to the library to request a book (loan). The librarian checks the availability of the requested books. If it's available, he will complete the registration form for users. Users will return the books after a period of time, but the librarian needs to check the quality of the returned books to finish returned service prosses. The librarian does another job which is to add new books to the system. Draw a use case diagram based on the above system.