We have two blocks. We call them A and B. Two medium yellow squares are in block A. Medium yellow square number one is below medium yellow square number two. A medium blue square is touching the bottom edge of this block. This object is below medium yellow square number one and medium yellow square number two. To the left of block A is block B which contains 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.
Which object is below a medium yellow square? the medium black square which is touching the bottom edge of a block or medium black square number two?
the medium black square  which is touching the bottom edge of a block  medium black square  number two both of them none of them