text: To sum up, I think the principal should go with policy A because the parent may need to get a-hold with the student for something extremely important, the student will most likely use their cell phone less during class from using it in their free periods, and there is no use not letting the student use their cell phone during a free period if they're not doing anything to begin with. These are my reasons in why I think the principal should go with policy A.A 3-D computer is a model of the face all 44 muscles and its called an "action unit". The Dr. Huang relies to work on of psycholoists and Dr. Paul Eckam, the creater of FACS (Facial Action Coding System). Dr. Eckman classified six basic emotions suprise, anger, happiness, fear, and sadness. Then he made associated each with charatcteristic movements of the facical muscles.