There are three blocks, A, B and C. Block B is below block C and to the right of block A. Block A has one medium yellow square. Block B has four medium yellow squares. Medium yellow square number one is touching the bottom edge of this block. Below medium yellow square number four and medium yellow square number three there is medium yellow square number two.. Below medium yellow square number four , medium yellow square number three and medium yellow square number two there is medium yellow square number one. Block C contains a medium blue square. Below a medium black square is the medium blue square.
What is below the black thing? a medium yellow square number three or a medium yellow square number four?
medium yellow square  number three medium yellow square  number four both of them none of them