There are two blocks, A and B. Block A is to the left of B. Block A contains a medium black square, one medium blue square and a medium yellow square. Below the medium yellow square there is the medium blue square. The medium black square is below the medium blue square and the medium yellow square. Block B contains a medium yellow square. There is also one medium black square in this block. Below the medium yellow square is the medium black square.
Which object is to the left of a medium black square? the medium yellow square that is in block A or the medium yellow square that is in block B?
the medium yellow square  that is in block A the medium yellow square  that is in block B both of them none of them