There are two blocks, A and B. Block A is to the left of B. Block A contains two medium yellow squares. This block also has a medium blue square. It also contains one medium black square. It is below medium yellow square number one and medium yellow square number two. The medium blue square is below medium yellow square number one , medium yellow square number two and the medium black square. Block B contains a medium yellow square.
What is above the blue object? a medium yellow square or a black object?
medium yellow square  black object both of them none of them