6. Examine the following shell script and describe its function line-by-line: #!/bin/bash echo -e "This program copies a file to the /stuff directory. " echo -e "Which file would you like to copy? --> \c" read FILENAME mkdir /stuff || echo "The /stuff directory could not be created." cp -f $FILENAME /stuff && echo "$FILENAME was successfully copied to /stuff" 2. Create a shell script that takes two IP address as its command-line arguments. Your script should ping each IP once. 3. Create a shell script that takes a username and a domain name as command-line arguments and outputs an email address constructed from those values. (For example, running ./make-email.sh dornm fvtc.edu would output "dornm@fvtc.edu".)