There are three blocks. We call them A, B and C. Block A has one medium yellow square. Above block A we have block B. It has a medium blue square and a medium yellow square. The medium blue square is below the medium yellow square. To the left of block B there is block C which has a medium black square. This block also has a medium yellow square. The medium black square is touching the bottom edge of this block. This shape is below the medium yellow square.
What is to the left of the blue thing? a medium yellow square or a medium black square that is touching the bottom edge of a block?
medium yellow square  medium black square  that is touching the bottom edge of a block  both of them none of them