Use `cut` to extract a list from /etc/passwd

How could I use the cut command to extract a list of usernames and login shells from the /etc/passwd file, where the resulting usernames and login shells are separated by a single space? Sort the resulting list in ascending alphabetical order, using the login shell as the primary key, and the username as a secondary key. Store the result in the newly created file ~/usershells.txt. This is the command I attempted: cut -d /etc/passwd -k7 -k1 | sort > ~/usershells.txt