Вы были на семинаре по малому бизне

Вы были на семинаре по малому бизнесу,не так ли?

Результаты (английский) 1:

Were you at the seminar on small business, isn't it?

Результаты (английский) 2:

You were at a seminar on small business, is not it?

Результаты (английский) 3:

you were at the seminar on small business, isn"t it?