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