This exercise calls for four to six head-and-shoulder images of the same model under different lighting conditions in order to demonstrate the effect of light on the face. As I don't have a model to drag around town, I shot myself using the Nikon D5100 with remote release.
(Outtake: 800is0, 5.6, 0.8)
The photos here are much like those I did for an assignment for a previous course: http://freedomtolook.blogspot.ae/2013/05/assignment-four-applying-lighting.html
(Outtake: 800is0, 5.6, 0.8)