There are three blocks, A, B and C. Block A is below B. Block B is above C. Block A contains one medium yellow square. Block B has two medium yellow squares. Below medium yellow square number two there is medium yellow square number one. It also contains one medium black square. Below medium yellow square number one and medium yellow square number two is the medium black square. And block C has one medium yellow square.
What is above the black shape? a medium yellow square number two or a medium yellow square number one?
medium yellow square  number two medium yellow square  number one both of them none of them