We have three blocks. We call them A, B and C. A medium yellow square and a medium blue square are in block A. The medium yellow square is below a medium black square and the medium blue square. The medium blue square is below the medium black square. Then, we have block B with two medium black squares in it. Below medium black square number two there is medium black square number one. A medium yellow square is below medium black square number two and medium black square number one. Finally, we have block C which is to the right of block A and above block B. It has a medium yellow square.
Which object is to the left of a medium yellow square? medium black square number one or the medium black square which is in block A?
medium black square  number one the medium black square  which is in block A both of them none of them