Can anyone help me answer that?

21. User's Primary Group id is listed in which file, at the time of creation of the user (On a standard Unix system) a) /etc/passwd b) /etc/groups c) /etc/login d) letc/profile 02 0208 vodA orls to ono 22. chmod does? a. Modify the server resources available to an application b. Change the permission of a file c. Check the permission of a file d. Change users OEI 04-1 (c 02I 0I (