Here is the link for Mentcare System case study:

http://cs.bemidjistate.edu/fneville/cs4360SWE/Mentcare-requirements-document.pd

The given case study for  Mentcare system have number user classes and also have specific the system requirements. All user classes have certain privileges over other user. Read the all users requirements and system specifications. You are instructed to design system architecture diagram for Mentcare system