Question: Construct an ER_Diagram for NSU Employees who are identified by a unique id number. NSU has 3 major types of employee (faculty, secretary and OSS)

Construct an ER_Diagram for NSU Employees who are identified by a unique id number.

NSU has 3 major types of employee (faculty, secretary and OSS) with their specific role. Each faculty has many research areas and they work on monthly salary basis. Secretary also works on monthly salary basis but they have an option for overtime. Security guard salary is calculated by the number of hours they worked in a month. At the end of each month, employees are paid form the NSU account. We are also interested to store the starting date of each employee.

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