This question is from advance Linux. ASAP please

Page 2 of 4 12. Assuming you are root issue the command to create the folder path fs/pub and give read only p octal method not symbolic.r.w.x ions to all e the owner which will have full permissions (Use absolute 13. Set the special group id bit on Infs/pub. (use symbolic this time.) 14. Where is the nfs exports file located? 15. Add to the exports file the directory Infs/pub and include all client IP addresses in the network range of 10.4.0.0/16, with the options ro, insecure, and sync 16 Issue the command and the option/parameter to export the shared directory 17. Issue the command that will show a list of firewall zones on a system? Page 3 of4 18. Issue the command that will show only the firewall default active zone? 19. What is the purpose of the /etc/skel directory