Помогите пожалуйста,составить 4 типа вопросов по британскому

Are John and Mike discussing the terms of a co...?- общий
Are John or Maxim and Mike discussing the terms of a co...?- другой
Who is discussing the terms of a co..?- особый
John and Mike are discussing the terms of a co...?-разделительный

1.John and Mike are discussing the terms of a contract, aren't they?
2.Who are discussing the terms of a contract?
3.Are John and Mike discussing the terms of a contract?
4.What are John and Mike doing?
5.Are John and Mike discussing the terms of a contract or of a book?