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