We have three blocks. We call them A, B and C. One medium yellow square, one medium blue square and one medium black square are in block A. The medium yellow square is below the medium black square and the medium blue square. The medium blue square is below the medium black square. Block B is above block A. It has a medium yellow square. Above block B there is block C which has one medium yellow square.
Which object is below a medium yellow square? the medium black square or the medium blue square?
the medium black square  the medium blue square  both of them none of them