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