When you quit how many days/weeks/months you are supposed to let your boss know you are quitting your position as a supervisor?

A minimum of two weeks; longer if asked to stay until a replacement was found. If you have another job lined up, they should understand and appreciate the fact that you are giving your current employer notice - it means you would be considerate enough to give your new employer notice as well.

2 weeks unless you think it will take much longer to find a replacement and train them. Ultimately, as much notice as possible is always preferred.

Two weeks is standard.

Check your agreement that you signed when you joined! If there's nothing mentioned, two weeks is pretty standard. Though sometimes they may let you go sooner or ask you to stay longer.

2 weeks.

If possible, hand in a letter of resignation around 2 weeks before. But if you know you want to quit now then there is nothing stopping you.

2 weeks

As soon as you know.