Interacting with persons with mental health conditions

Your son has been playing computer games all day and all night. He forgot to eat because of the game that he's playing, and it has affected his school performance.

Should you be concerned? What can you do?

Your mother has been forgetting things easily, like where she placed her house keys. She repeats herself in conversations and when you ask her about her forgetfulness, she gets agitated and sometimes claims that she was not informed.

What should you do?

Your co-worker is unusually talkative and seems to be on edge. She sent an email to all the staff in your organisation regarding a personal matter which was somewhat incoherent.

What can you do with her situation?