Draw a Context-Level Data Flow Diagram to Represent Example University's

Draw a context-level data flow diagram to represent Example University's Registrar's office system according to the following description. Students of Example University request courses via an automated telephone line. Registrar's office employees use the student records file, the course descriptions file, and the course registration file to identify whether students have met the pre-requisite and major requirements for each course they have requested and to determine whether there are seats available. The result of these processes is a set of student schedules. These are forwarded to the University Cashier's office to compare against the students' accounts receivable to make sure they have no outstanding fees due. This fee status information is returned to the Registrar's office and they either send a denial notice or an approved student schedule to each student.