Design and implement a class StudentDatabase that creates and maintains a text file of student data obtained from objects of the classes UndergradStudent and GradStudent, as described. A driver should...

Design and implement a class StudentDatabase that creates and maintains a text file of student data obtained from objects of the classes UndergradStudent and GradStudent, as described. A driver should create objects of UndergradStudent and GradStudent and then interact with StudentDatabase to create the text file. Subsequently, the driver should ask StudentDatabase for the data from the text file and create appropriate objects of UndergradStudent and GradStudent.