Suppose Alice has r and w rights over the file book. Alice wants to copy r rights to book to Bob. a.Assuming there is a copy right c, write a command to do this. b.Now assume the system supports a copy flag; for example, the right r with the copy flag would be written as rc. In this case, write a command to do the copy. c.In the previous part, what happens if the copy flag is not copied?   Note:Follow the concept of access control matrix and do not use commands like chmod.

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