We have two blocks. We call them A and B. Block A is below B. Block A has three medium black squares. Medium black square number one is touching the bottom edge of this block. Medium black square number two is below a medium blue square and medium black square number three. Medium black square number one is below the medium blue square and medium black square number two. Below the medium blue square is medium black square number three. Block B has one medium yellow square.
What is below the yellow shape? a medium black square or a medium blue square?
medium black square  medium blue square  both of them none of them