There are three blocks. Lets call them A, B and C. There is a medium black square in block A. It also has a medium yellow square. Below the medium black square is the medium yellow square. Below block A we have block B which contains a medium black square. Above block A there is block C with one medium black square and a medium yellow square in it. The medium black square is touching the bottom edge of this block. It is below the medium yellow square.
Which object is above a medium yellow square? the medium black square that is in block A or the medium black square that is in block B?
the medium black square  that is in block A the medium black square  that is in block B both of them none of them