There are two blocks, A and B. Block A is above B. Block A has one medium black square and a medium blue square. Below the medium blue square is the medium black square. There is also a medium yellow square in this block. The medium yellow square is below the medium black square and the medium blue square. Block B has a medium yellow square and one medium black square. Below the medium black square there is the medium yellow square.
Which object is above a medium yellow square? the medium black square which is in block B or the medium black square that is in block A?
the medium black square  which is in block B the medium black square  that is in block A both of them none of them