There are two blocks. We call them A and B. Block A is below B. Block A contains a big blue square. A big yellow square is to the left of, far from and below the big blue square. Block B contains one medium black triangle, a big black triangle and a small blue triangle. Above the big black triangle is the medium black triangle. The big black triangle is touching the bottom edge of this block. It is below, near to and to the left of the small blue triangle.
Which object is above a yellow object? the medium black triangle or the small blue triangle?
the medium black triangle  the small blue triangle  both of them none of them