These are the shapes that I shaded. Sphere, cube, and cones are all 3D shapes so mailing them like 3D on a 2D surface can't be all that easy. Shading can be hard at first but if you practice abit then you can get the hang of it. When I first started to shade these shapes I did encounter some problems. First, keeping the shading realistic, I had to have a single light source so if there was darkness near that it would make no sense. Second, this was minor problem but it was still some trouble that if I got the area to dark it would be too hard to erase that mistake. I took care of problem #1 by making sure I had a set point for a light source then thinking about how it would look like in real life. I solved the second problem by just got lightly at first until I was 100% that darkness goes there.