There are three blocks. Lets call them A, B and C. Block B is below block A and above block C. Block A contains a medium blue square and a medium black square. Below the medium black square there is the medium blue square. Block B contains one medium yellow square and a medium blue square. Below the medium blue square is the medium yellow square. And block C contains a medium black square.
What is above the yellow object? a medium blue square that is in block B or a medium blue square which is in block A?
medium blue square  that is in block B medium blue square  which is in block A both of them none of them