There are three blocks, A, B and C. Block C is below A and block B is below C. Block A has a medium blue square. A medium yellow square is touching the bottom edge of this block. It is below the medium blue square. Block B contains two medium yellow squares. There is also a medium black square in this block. Medium yellow square number one is below the medium black square and medium yellow square number two. Below the medium black square there is medium yellow square number two. And block C contains a medium yellow square.
Which object is above a medium yellow square? the medium blue square or the black object?
the medium blue square  the black object both of them none of them