Employee attendance System using QR Scan

This project is designed to take down employees attendance using QR code. Every employee will be having a card that contains a unique QR code. Each QR code represents a unique id for all employees. They just have to scan their cards in front of the webcam on arriving and the system notes down their attendance as per date and time. System then stores all the employees attendance records. It generates an overall report in excel sheet for admin and even allows him to search for particular employees attendance.

From the description above, do the following:

1. Identify and list FIVE system requirements.
2. Draw the use case diagram for this system. justify your diagram in one paragraph.
3. Draw the class diagram for this system. justify your diagram in one paragraph.
4. Draw sequence diagram for one use case of your choice.