We have three blocks. Lets call them A, B and C. There is a medium blue square in block A. Above block A there is block B with one medium black square in it. It also contains one medium yellow square. The medium yellow square is below a medium blue square and the medium black square. The medium blue square is below the medium black square. Above block B there is block C which contains a medium blue square.
Which object is below a medium blue square? the medium black square or the yellow object which is touching the bottom edge of a block?
the medium black square  the yellow object which is touching the bottom edge of a block  both of them none of them