Ich wohne in Deutschland. What is the pronomen in this?

If you are talking to your friend then from which pronomen will you call him

If you are a teacher and you are telling something to the whole class. so what pronomen will you use instead of saying the whole class?

if you are talking to a boss which pronomen will you use for him?

Who all are there in axis powers?

When did World War II end?

Who was Hitler's army chief?

Which country did Hitler betrayed?

When is Oktoberfest celebrated?