We have three blocks, A, B and C. Block C is below B. Block B is below A. Block A has a medium black square. Below a medium blue square there is the medium black square. Block B contains three medium yellow squares. Medium yellow square number one is touching the bottom edge of this block. Below medium yellow square number three is medium yellow square number two. Medium yellow square number one is below medium yellow square number two and medium yellow square number three. Block C contains a medium yellow square.
Which object is above a medium yellow square? the medium blue square or the medium black square?
the medium blue square  the medium black square  both of them none of them