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.
Which object is below a medium yellow square? the medium black square that is in block A or the medium black square which is in block C?
the medium black square  that is in block A the medium black square  which is in block C both of them none of them