Topic: Multi$-$level Security

Description: you classify users to $4$ levels $($public$,$ limited$,$ secret, top secret$).$ You have $50$ files on the disk, whose security level is also classified randomly. Then, you assign the security level of each file according to the same level. When a user login$,$ you can show only those files that he$/$she has access to$.$ You should use an appropriate model for your application.

In your submission, please specify how you run your program and provide a screen snapshot of how your execution looks like to assist grading.