Question 2: Access Control For this question concerns a Linux machine on which you are the administrator (with sudo rights). The system has 5 normal users aj, brian, nick, jc, lance (with their respective home directories in /home: /home/aj, and so on). In addition to the default user groups, there are 2 additional groups grpb ={aj, brain, nick }, and grpn ={jc, lance }. (a) [6 marks] The default permission for the user home directories is set as 755 , but you wish to limit access. Write the commands you would have to execute to change is so that no user can access another user's home directory. (b) [ 6 marks] You have been asked to create a folder in the root directory called NewReleases. This folder should be owned by aj and but only aj should allowed to delete other users' files; write access is to be granted to the group grpb, no other users get any access. Write down the commands, in order, that you would execute to create a folder matching this description. 1 (c) [ 1 mark ] What would the output of 1s - Id /NewReleases look like? You may add arbitrary values for any fields not specified in the