A Script with Arguments and Exit Codes

Every good command-line tool tells you how to use it when you call it wrong. Write one.

Task

Create the executable script /home/student/bin/greet.sh that behaves exactly like this:

Call	Prints to stdout	Prints to stderr	Exit code
greet.sh Sara	Hello, Sara!	nothing	0
greet.sh "Mary Ann"	Hello, Mary Ann!	nothing	0
greet.sh	nothing	usage: greet.sh NAME	2
greet.sh a b	nothing	usage: greet.sh NAME	2

The grader runs the script with other names too.