There are three blocks. Lets call them A, B and C. There is a medium yellow square in block A. Then, there is block B. It has one medium blue square. Block C is to the right of block B. Block A is below it. It contains two medium black squares. Below medium black square number two there is medium black square number one. It also has one medium yellow square. The medium yellow square is below medium black square number one and medium black square number two.
Which object is above 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