Problem 2. Linux File Permissions (20 pt., 4 pt. each) For each permission requirement below, provide (1) symbolic permission and (2) 4-digit octal (numeric) permission. a. For a file named a.png, Owner: can read and write Group: can read and write World: forbidden 2 Symbolic permission? Numeric permission? b. For a directory of dir1, Owner: can read, write, and execute Group: can read and execute World: can read and execute Symbolic permission? Numeric permission? c. For a file named passwd, Owner: can read, write, and execute Group: can read and execute World: can read and execute Set user ID bit enabled Symbolic permission? Numeric permission? d. For a directory of dir2, Owner: can read, write, and execute Group: can read, write, and execute World: can read, write, and execute Sticky bit enabled Symbolic permission? Numeric permission? e. For a file of b.txt, Owner: can read, write, and execute Group: can read, write, and execute World: can read and execute Set group ID bit enabled Symbolic permission? Numeric permission?