We have three blocks. We call them A, B and C. Block A is above B. Block B is above C. Block A has one medium blue square and one medium black square. The medium blue square is below the medium black square. Block B contains a medium yellow square and one medium black square. The medium yellow square is below the medium black square. Block C contains one medium black square.
What is below the yellow shape? a medium black square that is in block C or a medium black square that is in block B?
medium black square  that is in block C medium black square  that is in block B both of them none of them