Twelve balls, four each of the three colors, were suspended by strings from a 6x6 array of hooks in a glass box. Each ball hung at one of four levels; no more than one ball hung from any hook.
The grid above is a bird's-eye view of an empty box. The two diagrams at the bottom show the arrangement of balls from two different angles. The first is a front view; the second is a view from the right side. Can you determine the positions of the 12 balls in the box?