1. It is you who are responsible for this, aren't you?<br/><br/>2. Rahim as well as Karim is two brothers, aren't they?<br/><br/>3. The Headmaster and Secretary is coming, isn't he?<br/><br/>4. Time and tide wait for none, do they?<br/><br/>5. Many a student is absent from the class, aren't they?<br/><br/>6. Bread and butter is my favourite food, isn't it?<br/><br/>I am not sure whether the above tag questions are correct or not. Please, help me to get the correct answer.