An educational institution wishes to maintain a database of its employees. The database is divided into a number of classes (Staff, Lecturer, Executive, Education, Worker, Permanent, and Temporary) whose hierarchical relationships are shown in following figure. The figure also shows the minimum information required for each class. The class Temporary has two private members wagePerHour and hour. The salary is calculated as wage * hour. Create all classes and define functions to create the database and retrieve individual information as and when required. Write a driver program to test the class Lecturer, Executive, Permanen

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