There are two blocks, A and B. There are one medium yellow square, one medium blue square and a medium black square in block A. The medium yellow square is touching the bottom edge of this block. Below the medium black square there is the medium blue square. Below the medium blue square and the medium black square there is the medium yellow square. Block B is above block A. It contains a medium black square and one medium blue square. Below the medium blue square and a medium yellow square there is the medium black square. The medium yellow square is below the medium blue square.
Which object is below a medium yellow square? the medium black square which is in block B or the medium black square that is in block A?
the medium black square  which is in block B the medium black square  that is in block A both of them none of them