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