We have three blocks. We call them A, B and C. Block A contains one medium black square. To the left of block A there is block B with a medium black square, a medium yellow square and one medium blue square in it. The medium black square is touching the bottom edge of this block. It is below the medium yellow square and the medium blue square.. The medium yellow square is below the medium blue square. Finally, we have block C below block A. It has a medium blue square.
Is there any medium black squares above a medium blue square?