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