There are two blocks. Lets call them A and B. Block A is above B. Block A has a medium yellow square, a medium black square and a medium blue square. The medium yellow square is touching the bottom edge of this block. This shape is below the medium black square which is below the medium blue square. It is below the medium blue square. Block B has a medium black square. The medium black square is below a medium yellow square.
Which object is below a medium square? the medium black square that is in block A or the medium black square which is in block B?
the medium black square  that is in block A the medium black square  which is in block B both of them none of them