Represent the ownerships and permissions shown in this UNIX directory listing as a
protection matrix. (Note: asw is a member of two groups: users and devel; gmw is a
member only of users.) Treat each of the two users and two groups as a domain, so
that the matrix has four rows (one per domain) and four columns (one per file).
rwrr 2 gmw users 908 May 26 16:45 PPP Notes
rwxrxr-x 1 asw devel 432 May 13 12:35 prog1
rwrw 1 asw users 50094 May 30 17:51 project.t
rwr 1 asw devel 13124 May 31 14:30 splash.gif
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