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