There are three blocks. We call them A, B and C. Blocks B and C are above A. Block A has three medium black squares. Below medium black square number two which is below medium black square number three is medium black square number one. Below medium black square number three and medium black square number two there is a medium blue square. Medium black square number one is touching the bottom edge of this block. It is below medium black square number three. Block B contains a medium blue square. And block C contains one medium yellow square.
Which object is below a medium blue square? medium black square number two or medium black square number three?
medium black square  number two medium black square  number three both of them none of them