There are three blocks. We call them A, B and C. There is one medium blue square in block A. Block B is above block A. It contains two medium yellow squares. Medium yellow square number one is below medium yellow square number two. Finally, there is block C. It is above block A. It contains two medium black squares. Below medium black square number two there is medium black square number one.
Which object is above a medium 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