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