We have three blocks. Lets call them A, B and C. Block A has one medium black square. Above block A there is block B. It has two medium yellow squares. Medium yellow square number one is touching the bottom edge of this block. This object is below medium yellow square number two. Below block B there is block C with a medium blue square in it. This block also has a medium black square. Below the medium black square there is the medium blue square.
Which object is below a medium yellow square? the medium black square which is in block A or the medium black square which is in block C?
the medium black square  which is in block A the medium black square  which is in block C both of them none of them