Develop a layered information system architecture that allows users to view information about flights arriving and departing from a particular airport. What is the main idea of software patterns? Why is it important? List the commonly used architectural patterns. What are the 5 key activities in an object-oriented design process? List and briefly explain. Using the UML graphical notation for object classes, design a bank account object classes, identifying attributes and operations. Use your own experience to decide on the attributes and operations that should be associated with these objects.