There are two blocks, A and B. Block A is above B. Block A contains two medium blue squares. This block also contains a medium black square and one medium yellow square. Below medium blue square number two and the medium yellow square there is the medium black square. Medium blue square number two is below the medium yellow square. Below the medium yellow square and the medium black square there is medium blue square number one. Block B contains a medium blue square.
Which object is above a medium blue square? the medium black square or the medium yellow square?
the medium black square  the medium yellow square  both of them none of them