There are three blocks. We call them A, B and C. Block A is to the left of block B and above block C. Block A contains a medium blue square. Block B has one medium blue square. And block C has three medium yellow squares. Below medium yellow square number two there is medium yellow square number one. Below medium yellow square number three and a medium black square is medium yellow square number two. Medium yellow square number one is touching the bottom edge of this block. Below medium yellow square number three is the medium black square. Medium yellow square number one is below medium yellow square number three.
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