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