The lawyer under whose supervision an eligible law student engages in any of the activities permitted by this rule shall:

   (A) Be duly admitted to practice law in Nebraska.

   (B) Assume personal professional responsibility to the client for the services performed by the law student.

   (C) Secure the prior written consent of the client for the services actually to be performed in court by the law student.

   (D) Assume personal professional responsibility for the student's guidance in any work undertaken and for supervising the quality of the student's work.

   (E) Assist the student in his or her preparation to the extent the supervising lawyer considers it necessary.