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