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