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