In this exercise you will make a script `input-redirection.sh`.
This script will read from an here document (`HereDoc`).
Usually this technique is used to programmatically generate scripts or configuration files receiving some multiline input.
The script will create a file `show_info.sh` that will run the command `cat` with `-e` as argument.
The input to `cat` will be passed using `HereDoc`. Running `show_info.sh` will output some useful information about three common environment variables.
> The environment variables are `PWD`, `PATH` and `USERNAME`.