"A **true teacher** does not jealously guard his understanding."
The commissioner was most impressed by the result of your answers.
He has now asked your help to create a training program for the future police inspectors. You gladly accept as you think that this will help lessen your burden of fighting crime in the future.
To simplify your life as a teacher and as the answers will not be exactly the same in each `mystery` folder, you need to write a `teacher.sh` file that does the following:
- step 2, it isolates, thru as similar command that you used to find it, and into an environment variable, the number (**and only the number**) of the key interview that helped solved the mystery (Unlike the interview number, the adress will not change across the `mystery` folders that will be tested, hence the command to find the interview is the same across all the `mystery` folder that will be tested).
- step 3, it prints the newly created environment variable.
- step 5, it executes the command that should have printed the shorted list of 4 suspects. (it shows only the license Plate, the Make, the Color, the Owner, and the Height)
- step 6, it executes the command that should have gotten your main suspect convicted (as a reminder the result of that command should be the printing of a number) except that now you replace your suspect name with the environment variable MAIN_SUSPECT.
Note that for **step 2 to 6**, all the commands have to be executed with keeping in mind that the `mystery` folder is the current directory but that its name will vary.
