please help. i only need part 3 and part 4 (the last picture included) i will give a good rating and thumbs up for quick corrext answer

Assignment 1: 1. Bootstrapping is the standard term of starting up a computer system. During booting, the kernel is loaded into memory and begins to execute. Linux OS bootstrapping is considered as one of the attack vectors used by malicious actors. Errors in boot configuration, missing or unreadable hardware, and damaged file systems can all prevent a computer system from booting. GRUB (Grand Unified Boot Loader) uses a configuration file that sets up the menu interface. The configuration file is called grub.cfg 2.Where is the location of this file in your Linux Operating System? In Kali Linux(as well as many other Linux distros), the grub.cfg file is usually located at /boot/grub/grub.cfg. File location. b. What is the content of the file (use screenshots to show the output) 2. Use the 'adduser' command to create two users named 'yourFirstName' and 'yourLastName'. 'tamirat' and 'abegaz' for my case. (Use screenshot to verify your work) a. Use the sudo adduser 'yourFirstName' sudo to add this user into the sudoer group b. Use the sudo visudo to add yourLastName user into the sudoer group 3. What is umask? How is it different from chmod? Use the command umask to give no permission to the groups or the world (everyone) of all newly created files and directories. Show this by creating new directory and file( use screenshots to demonstrate the results you obtained)