Update textbook.en.md

00.brainstorming-pedagogical-teams/40.collection-existing-pedagogical-content/05.classical-mechanics/vector-analysis/textbook.en.md

@@ -12,6 +12,17 @@ graph TD;
     C-->D;
 ```
 <br>
+
+```mermaid
+graph TD;
+    write_courses_with_m3p2-->display_in_website;
+    write_courses_with_m3p2-->create_customized_pdf;
+    write_courses_with_m3p2-->use_in_videoprojection;
+    display_in_website-->student;
+    create_customized_pdf-->student;
+    use_in_videoprojection-->student;
+```
+<br>
   
 ```mermaid
 graph LR