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