We have three blocks, A, B and C. A medium blue square is in block A. Then, there is block B which has three medium black squares. Medium black square number one is touching the bottom edge of this block. Below medium black square number three there is medium black square number two. Medium black square number one is below medium black square number two , a medium blue square and medium black square number three. The medium blue square is below medium black square number two. Block C is below block B. Block A is to the right of it. It contains one medium yellow square.
What is above the shape that is touching the bottom edge of a block? a medium black square or a medium yellow square?
medium black square  medium yellow square  both of them none of them