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8. [This is an extra credit question (20 Pts), credits are given only to submissions before the due] Considering file access control in an UNIX-like

8. [This is an extra credit question (20 Pts), credits are given only to submissions before the due] Considering file access control in an UNIX-like file system, answer the following questions: (1) What does permission "-Irwxjr-xIrw-" mean? (2) Convert the numeric notation of a directory permission "644" to the corresponding 10 character symbolic notation. Enter

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