We have three blocks. Lets call them A, B and C. Block A is below blocks C and B. Block A contains a medium black square. This block also has one medium yellow square. The medium yellow square is below the medium black square. Block B contains a medium yellow square and a medium black square. The medium yellow square is below the medium black square. And block C contains a medium blue square.
Which object is above a medium yellow square? the medium black square that is in block B or the medium black square that is in block A?
the medium black square  that is in block B the medium black square  that is in block A both of them none of them