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