There are two blocks, A and B. Block A is above B. Block A has two medium black squares. It also contains one medium yellow square. It also has one medium blue square. It is below the medium yellow square. Below the medium yellow square there is medium black square number two. Below the medium blue square , medium black square number two and the medium yellow square there is medium black square number one. Block B has one medium yellow square.
Which object is below a medium yellow square? medium black square number two or medium black square number one?
medium black square  number two medium black square  number one both of them none of them