need help with this linux command just the commands to solve the following Questions in the picture please and thank you.

PART-C: REAR 8. Add HDD of 5GB to VM1 and mount it as /rearbackup and filesystem should be xfs. 9. Backup your VM1 system for rescue using RedHat's REAR (RELAX-AND-RECOVER) as iso file to /rearbackup and list it PART-E: POSTFIX 15. In VM1 create users johnnnnn and nancynnnn and assign password to the users 16. In VM2 create users smithnnnn, franknnnn and janennnn and assign password to the users 17. Configure VM1 as Postfix Central Mail Server and VM2 as Remote Host. 18. In CMS, send email to johnnnnn and nancynnnn 19. In Remote Host, send email to johnnnnn, nancynnnn, smithnnnn and janennnn. 20. In Remote Host login as janennnn send email to smithnnnn, franknnnn and nancynnnn