There are three blocks. We call them A, B and C. Two medium yellow squares are in block A. Medium yellow square number one is below a medium blue square which is below medium yellow square number two. It is below medium yellow square number two. Block B is above block A. It contains a medium black square. Finally, we have block C to the right of block B. It has two medium yellow squares. Medium yellow square number one is touching the bottom edge of this block. It is below medium yellow square number two. It is below a medium black square which is below medium yellow square number two.
Which object is below a medium black square? the medium blue square or the medium yellow square that is touching the bottom edge of a block?
the medium blue square  the medium yellow square  that is touching the bottom edge of a block  both of them none of them