There are three blocks. Lets call them A, B and C. Block A is above blocks B and C. Block A contains a medium blue square. Block B contains one medium yellow square. And block C contains one medium blue square. A medium black square is below the medium blue square. It also contains a medium yellow square. The medium yellow square is below the medium black square and the medium blue square.
Which object is below a medium blue square? the medium black square or the medium yellow square that is touching the bottom edge of a block?
the medium black square  the medium yellow square  that is touching the bottom edge of a block  both of them none of them