This is a 3D nonogram. The first five boxes represent the five layers of a $5\times5\times5$ cube, and the last box shows the enumerations for the Z-axis. (Note that 11 means two stretches of length one here, not one of length eleven.)
To increase the difficulty somewhat, a few of the numbers have been replaced with question marks. A question mark simply means that the number of shaded cells in that row or column is unknown.
Name the geometric object that appears in six different forms in the grid.