We have two blocks. Lets call them A and B. Block A is above B. Block A contains one medium blue square and a medium yellow square. Below the medium yellow square there is the medium blue square. Block B has one medium black square and one medium yellow square. There is also one medium blue square in this block. It is below the medium yellow square. The medium black square is touching the bottom edge of this block. It is below the medium blue square. This object is below the medium yellow square.
What is above the black thing? a medium yellow square which is in block A or a medium yellow square that is in block B?
medium yellow square  which is in block A medium yellow square  that is in block B both of them none of them