There is a block which contains one small blue square, one small black triangle and one medium black triangle. It also contains one medium black square and a medium yellow triangle. To the left of the small black triangle there is the medium black square. The small blue square is touching the right edge of this block. The small black triangle is above the medium black triangle. To the right of, below and near to the medium yellow triangle is a medium blue square.
What is below the yellow thing? a medium black square or a medium blue square?
medium black square  medium blue square  both of them none of them