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