Question: 2. Let the following be the role hierarchy relationships. Note that (ri,Tj) means role ri is senior to role rj. Let each role be assigned

2. Let the following be the role hierarchy relationships. Note that

2. Let the following be the role hierarchy relationships. Note that (ri,Tj) means role ri is senior to role rj. Let each role be assigned to exactly one unique user (user u is assigned to role r) RII { (ri,T2), (ri, rs), (r2, ra), (T2.rs), (r3,rs), (r6 ,T3), (r6,T7), (T7.rs)} (a) Draw the role hierarchy. (Hasse diagram). . . (b) Determine authorized_ users(r3) and authorized users(r

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