3. [2 pts] consider the biba integrity model rules. assume there are three security clearance levels for a subject: top secret, confidential and public in descending order. assume a document has these same three levels as a classification. assume jane has security clearance at level confidential and answer the following questions. (a) can she read a document classified as top secret and what rule enforces this? (b) can she write to a document classified as top secret and what rule enforces this?