Привет.Помогите задать 5 типов вопросов к предложению: I have been a customer in your restaurant several times.

Have you been a  customer in your restaurant several times? Have you been a  customer in your restaurant or in your cafe several times? I have been a customer in your restaurant several times, haven't I? I wonder if I have been a customer in your restaurant several times.  

1. Have you been a customer in your restaurant several times? 2I have been a customer in your restaurant several times,haven't I( you)? 3 Who has been a customer in your restaurant several times? 4 How many times have you been a customer in your restaurant? 5Have you been a customer or a singer in your restaurant several times? 6 Where have you been a customer several times?