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