1. In the file simple.tgl, inject a LightPosition command. Try to switch
   the order of the ViewTransform command and the LightPosition command.
   What is the difference?

2. What is the difference between zooming in and out and moving the
   viewpoint farther or closer? Try zooming in as much as
   possible. Then move out until you see most of the scene. Zoom back
   out (as much as possible) and then move in until the scene is about
   as big as before. What is the difference?

3. Consider what AmbientColor, DiffuseColor, SpecularColor, and
   Shininess really mean. Write your findings.

4. Experiment with various tesselation levels, wireframe, and smooth
   vs flat shading. How does tesselation affect shading? Is it the
   same for the smooth shading and the highlights.

5. Create a new file with just a single triangle. Change it to use indexed
   primitives.

6. Create a tetrahedron (three sided pyramid) using indexed primitives.

7. Draw a graph for some new (hierarchical) object - like a car, a
   complete robot, or something else. Create this object using the
   present modelling language. If you think it is easy, your object
   was too simple!

8. Create a scene with several instances of your hierarchical 3D model 
   from 5. The instances should be drawn using display lists.