We have three blocks. Lets call them A, B and C. One medium blue square is in block A. Below a medium black square there is the medium blue square. Then, there is block B which contains one medium black square. Block C is to the left of block A and above block B. It contains two medium black squares. Medium black square number one is below a medium blue square and medium black square number two. The medium blue square is below medium black square number two.
Which object is above a medium black square? medium black square number two or the medium black square which is in block A?
medium black square  number two the medium black square  which is in block A both of them none of them