There are two blocks. We call them A and B. There are two medium yellow squares in block A. Medium yellow square number one is below medium yellow square number two. There is also a medium black square touching the bottom edge of this block. The medium black square is below medium yellow square number two and medium yellow square number one. Block B is to the left of block A. It contains one medium blue square and a medium black square. The medium blue square is below the medium black square.
What is above the thing that is touching the bottom edge of a block? a medium blue square or a medium yellow square?
medium blue square  medium yellow square  both of them none of them