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5. (2 pts) Suppose Alice has r and w rights over the file Book. Alice wants to grant r rights to Book to Bob. Assume
5. (2 pts) Suppose Alice has r and w rights over the file Book. Alice wants to grant r rights to Book to Bob. Assume the system supports a copy flag; for example, the right r with the copy flag would be written as rc. Please define commands that can capture the following operations. (a) If Alice has the rc right to Book then Alice can grant r right to Bob. (b) If Alice has the rc right to Book and Bob does not have the r right to the Book, then Alice can grant r right to Bob
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