There are two blocks. Lets call them A and B. Block A is above B. Block A contains one medium blue square and a medium black square. The medium blue square is below the medium black square. Block B has a medium blue square and one medium black square. The medium blue square is below the medium black square. A medium yellow square is touching the bottom edge of this block. It is below the medium black square and the medium blue square.
What is above the yellow thing? a medium black square that is in block B or a medium black square that is in block A?
medium black square  that is in block B medium black square  that is in block A both of them none of them