There are three blocks. Lets call them A, B and C. Block B is below C. Block A is below B. Block A contains a medium black square. Block B contains two medium yellow squares. Below medium yellow square number two is medium yellow square number one. One medium black square is also touching the bottom edge of this block. The medium black square is below medium yellow square number two and medium yellow square number one. And block C contains one medium blue square and a medium yellow square. The medium blue square is below the medium yellow square.
What is below the blue thing? a medium yellow square or a black thing which is touching the bottom edge of a block?
medium yellow square  black thing which is touching the bottom edge of a block  both of them none of them