We have three blocks. Lets call them A, B and C. Block B is to the left of block A and below block C. Block A has two medium black squares. It also has one medium yellow square. Medium black square number one is below medium black square number two. Below medium black square number one and medium black square number two there is the medium yellow square. Block B contains two medium black squares. Medium black square number one is touching the bottom edge of this block. It is below medium black square number two. And block C contains two medium yellow squares. Below a medium blue square and medium yellow square number two there is medium yellow square number one. The medium blue square is below medium yellow square number two.
Which object is to the left of a medium black square? the medium black square that is touching the bottom edge of a block or medium black square number one?
the medium black square  that is touching the bottom edge of a block  medium black square  number one both of them none of them