There are two blocks. We call them A and B. Block A is below B. Block A contains two medium blue squares. Medium blue square number one is touching the bottom edge of this block. This object is below medium blue square number two. Block B has two medium black squares. Medium black square number one is below medium black square number two. It also contains a medium yellow square. The medium yellow square is below medium black square number two and medium black square number one.
What is below the yellow object? a medium blue square that is touching the bottom edge of a block or a medium blue square number two?
medium blue square  that is touching the bottom edge of a block  medium blue square  number two both of them none of them