1)Is there...?
Yes, it is.
2)Is there..?
Yes, it is.
3)Are there two tables ...?
No, they aren't. There is only one table in the room.
4)Are there...?
No, they aren't. There are only two.
5)Is there...?
Yes, it is.
6)Is there ...?
Yes, it is.
7)Is there...?
No, it isn't.
8)Are there...?
(Сори, я не вижу, есть ли картины) Если да, то Yes, they are. Иначе - No, they aren't