Introduce a withdraw method in the Course class, allowing for the withdrawal of a student either from the class list or the wait list, or taking no action if the student is not on any list.

This method will print a message indicating:

"The student $[$student description$]$ has been withdrawn from $[$course short title$]."$ if the student was on the class list.

o "The student $[$student description$]$ has been withdrawn from the wait list of $[$course short title$]."$ if the student was on the wait list.

o "The student $[$student description$]$ is not on any list of $[$course short title$]."$ otherwise.

If the student is withdrawn from the class list, the method will also remove the course from the student's CourseList.

Moreover, if the student was on the class list and there are students on the wait list, the first student on the wait list will be registered for the class, and removed from the wait list.

When removing a student from a list or a course from a CourseList, ensure to fill in the gap by shifting all following students$/$courses up$.$