Write a normal and an exception scenario for the "Face recognition Management" use case. $(10\text{'})$Tip: In this use case, sampled photos are first took by the FRM$,$ and then sent to the remote CSM for verification. If success, the door opening signal is sent to the door. After teachers or students pass the door, it is closed. If the electric door is offline, the security guard needs to verify the identification card and open the door using the remote controller.