Website to detect multiple faces and voice

* have a website which you click start.
* it will prompt you to enable cam and microphone
* During this time website will detect two things:
1_if multiple human faces are detected (i.e. two or more faces) then show message "Don't cheat- multiple faces detected" with ok button to close
2_if a human voice is detected, then show message "Don't cheat- stop speaking" with ok button to close