There are two blocks. We call them A and B. There are a medium black square and one medium yellow square in block A. Below the medium black square which is below the medium yellow square there is a medium blue square. It is below the medium yellow square. Block B is below block A. It has a medium black square. Below the medium black square there is a medium blue square.
Which object is above a medium blue 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