We have three blocks. We call them A, B and C. Block A contains two medium black squares. Medium black square number one is below medium black square number two. It also contains a medium blue square. Below medium black square number two there is the medium blue square. It is below medium black square number one. Then, there is block B which contains one medium yellow square. Finally, above block A we have block C which is below block B. It contains a medium yellow square. There is also a medium blue square touching the bottom edge of this block. Below the medium yellow square is the medium blue square.
Which object is below a medium yellow square? medium black square number one or medium black square number two?
medium black square  number one medium black square  number two both of them none of them