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