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