1. Classify each of the following as an example of a mandatory, discretionary, or originator controlled policy, or a combination thereof. Justify your answers.

a. The file access control mechanisms of the UNIX operating system

b. A system in which no memorandum can be distributed without the creator's consent

c. A military facility in which only generals can enter a particular room

d. A university registrar's office, in which a faculty member can see the grades of a particular student provided that the student has given written permission for the faculty member to see them