how to make simple bash script

[sweet_monic]

how to make this BASH script :

1. i want to Change my current directory to /tmp and Issue a customized welcome message to this directory (using the variables that contain my username and the name of this directory); e.g. "Welcome george to /tmp" and Lists the contents of this directory

2.script that will output only the first field of the file /etc/group (using cut command)

3. script that will output the contents of the file /etc/group in numeric order based on the 3rd field (using sort commands)

thx for help

[darkrose0510]

Doing homework are we?

[Bemk]

well I know that it should be some thing like this:

#!/bin/sh
cd /tmp
echo welcome message + variable name

A bash script is just running the commands in the script. This is just step one. Step 2 and 3 you need to figure out your self, simply because I don't know how to continue this.