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