1. (50 points) We experiment with permissions on files in this exercise. a. Find out the permissions on /etc/passwd and explain the meaning of the permissions. b. Find out the permissions on command mount and explain the meaning of the permissions. You can find the path to the program with which command "which mount". c. What is the primary group of user seed? What are the supplementary groups? d. Create a new file a. Use a text editor or simply redirect output as "echo message > a". Find its permissions and associated user id and group id. e. The command chmod can change permissions on files and directories. Use the command to change the permissions of file a so that group and other users do not any permissions. f. The command chown can change the owner and group associated with a file. Change the group associated with file a to sudo. g. Change file a's group to ssh. If you do not run the command with sudo, you will see an error message. Why?