Final answer:
The question involves using the chmod command to give write group permission to files in the /hr. directory and the ls -l command to verify these changes on a Linux or Unix-like system.
Step-by-step explanation:
The task describes a scenario that involves modifying file permissions on a Linux or Unix-like system. To give the write group permission to the files in the /hr. directory, you would use the following command in the terminal:
chmod g+w /hr/*
The chmod command changes the permissions of each file to allow (+w) the group (g) write access. After changing permissions, you can verify the changes with the ls -l /hr. command, which will list the files and their permissions. You should see the letter 'w' in the group permissions portion of the file listing for each file in the /hr. directory.