2 new shell ex for quest 01

subjects/explain.en.md

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+## explain
+
+### Instructions
+
+"So you want to play?"
+
+"How did you do it?"
+
+The commissioner thanks you for delivering the suspect. He now asks you how did you get into his trail.
+
+Write an `explain.sh` file that:
+
+- displays the first and last name of your key witness
+- displays the interview number of this witness
+- displays the colour and the make of the car of the suspects
+- displays the names of the 3 other main suspects that were not arrested (in the order that they should have appeared during the investigation)
+
+### Usage
+
+```console
+student@ubuntu:~/piscine-go/test$ ./explain.sh | cat -e
+FirstNameOfWitness LastNameOfWitness$
+123456$
+Red Ferrari$
+FirstNameOfSuspect1 LastNameOfSuspect1$
+FirstNameOfSuspect2 LastNameOfSuspect2$
+FirstNameOfSuspect3 LastNameOfSuspect3$
+student@ubuntu:~/piscine-go/test$
+```
+
+### Hint
+
+"The answers in the usage are obviously there for formatting only, but you obviously knew that already... or did you? :) "

subjects/teacher.en.md

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+## teacher
+
+### Instructions
+
+"let's play!"
+
+"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.
+
+In a training folder, various folders `mistery` were prepared with some key differences in the data for each group of trainees.
+
+To simplify your life as a teacher and as the answers will not be exactly the same in each `mistery` folder, you need to write a `teacher.sh` file that does the following:
+
+- step 1, it enters the `mistery` folder.
+- step 2, it isolates into an environment variable the number (**and only the number**) of the appropriate interview that helped solved the mistery (Unlike the interview number, the adress will not change across the `mistery` folders that will be tested).
+- step 3, it prints the newly created environment variable.(Once again **the number and only the number**)
+- step 4, it prints what the interview contains.
+- step 5, it executes the command that should have printed the shorted list of 4 suspects.
+- step 6, it executes the command that should have gotten your main suspect convicted (as 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.
+
+- step 7, step 1 to 6 are repeated for each `mistery`.
+
+Note that for **step 2 to 6**, all the commands have to be executed with keeping in mind that the `mistery` folder is the current directory but that its name will vary.
+
+Now show them who is the boss...
+
+### Hint
+
+Search how to do a loop with a `.sh` file now.