Problem description You are hired by a local video rental store to write software to help with the store operation. This includes things like keeping track of the inventory, the customers, the stock items that are checked out, and accruing customer fines. The store is staffed by employees, who are the only people who will have access to the software. The store rents its items of stock, which includes movies and computer games. The software should support a set of queries about customers and stock items, as well as a set of transactions that change customer or stock information.