/**
  * Preview the exercise as Instructor
  *
  * @param \_OurBrand_\Quiz\Domain\Model\Exercise $exercise
  * @return void
  */
 private function previewAssignment($exercise)
 {
     $mode = 'withComma';
     $answerData = $exercise->getAnswers();
     $this->view->assign('explanationTranslateKey', 'exercise.SpellingAndGrammar.Comma.explanation');
     $this->view->assign('currentExercise', $exercise);
     $this->view->assign('quiz', $exercise->getQuiz());
     $this->view->assign('session', $this->studentQuizSession);
     $this->view->assign('mode', $mode);
     $this->view->assign('answers', $answerData);
 }