There are two blocks, A and B. Block A is to the left of B. Block A has three medium yellow squares. Medium yellow square number two is below medium yellow square number three. It also has a medium blue square. Medium yellow square number one is below medium yellow square number two.. The medium blue square is below medium yellow square number two , medium yellow square number three and medium yellow square number one. Block B contains two medium black squares. Medium black square number one is touching the bottom edge of this block. It is below medium black square number two.
Which object is to the left of a medium black square? medium yellow square number one or medium yellow square number two?
medium yellow square  number one medium yellow square  number two both of them none of them