There are three blocks, A, B and C. Block A is above and B is to the right of C. Block A contains a medium yellow square. Block B contains two medium yellow squares. Medium yellow square number one is touching the bottom edge of this block. It is below a medium blue square which is below medium yellow square number two. This shape is below medium yellow square number two. Block C has one medium black square. One medium yellow square is also in this block. The medium black square is below the medium yellow square.
What is to the left of the blue shape? a medium yellow square or a medium black square?
medium yellow square  medium black square  both of them none of them