We have two blocks, A and B. There are one medium black square and a medium blue square in block A. The medium black square is below the medium blue square and a medium yellow square. Below the medium blue square is the medium yellow square. Block B is above block A. It contains two medium blue squares. Medium blue square number one is touching the bottom edge of this block. It is below medium blue square number two.
What is above the black object? a medium yellow square or a medium blue square?
medium yellow square  medium blue square  both of them none of them