There are three blocks. We call them A, B and C. Block A contains two medium yellow squares. Medium yellow square number one is below medium yellow square number two. This block also contains a medium blue square. Below medium yellow square number two and medium yellow square number one there is the medium blue square. Below block A there is block B. It has two medium black squares. Medium black square number one is touching the bottom edge of this block. It is below medium black square number two and a medium blue square. The medium blue square is below medium black square number two. Above block B there is block C which has one medium blue square.
Which object is below a medium blue square? medium black square number two or the medium black square that is touching the bottom edge of a block?
medium black square  number two the medium black square  that is touching the bottom edge of a block  both of them none of them