There are two blocks. Lets call them A and B. Two medium black squares are in block A. It also contains a medium yellow square. It is below medium black square number two. Below medium black square number two is medium black square number one. It is touching the bottom edge of this block. It is below the medium yellow square. Block B is to the left of block A. It contains two medium yellow squares. Below medium yellow square number two there is medium yellow square number one.
Which object is below a medium black square? the medium yellow square that is in block A or medium yellow square number two?
the medium yellow square  that is in block A medium yellow square  number two both of them none of them