draw and solve

Question One: "National Bank" is developing a new application for "Online Banking Services". Draw a Context Diagram and DFD0 covering the following functionalities only: Customers should first register using the application by entering their details, a confirmation will be sent to the customer by the system. The application allows customers to perform multiple functionalities; they should be able to check their balance by entering their account details, they should be able to make transactions online by selecting transaction type. All information about the transactions will be stored. The Bank Employee can generate reports using the customer details or the transactions