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