In this layer nine cubes are painted green on at least one face and four cubes are painted green on two faces.
In this layer four cubes are painted green on one face. This layer is equivalent to layers II, III and IV. Therefore. 4x3=12 cubes have been painted green on one face. Green coloured face below
In this layer also nine cubes are painted green on at least one face while four cubes are painted green on two faces. (1) There is no cubes which ispainted green on three faces.