ответить на вопросы you are often late, aren't you? your best friend is late today, isn't he/ she? who is late today?

You are often late, aren't you? (Ты часто опаздываешь, не так ли?) - Yes, I am / No, I am not.
Your best friend is late today, isn't he/she? (Твой лучший друг(подруга) опаздывает сегодня, не так ли?) - Yes, he(she) is/ No, he(she) isn't
Who is late today? (Кто опаздывает сегодня?) - She is late today