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 above a medium blue square? the medium blue square that is in block C or the medium blue square that is in block B?
the medium blue square  that is in block C the medium blue square  that is in block B both of them none of them