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