Задать 3 типа вопросов+отрицание they usually have lunch at 1 p.m (when)

They usually have lunch at 1 pm.
Do they usually have lunch at 1 pm?
They usually have lunch at 1 pm, don't they?
When do they usually have lunch?
Who has lunch at 1 pm?
They don't usually have lunch at 1 pm.