Multiple Quiz’s and Final Quiz

Hi, Nearly got the system working and ready for use.. I have several in-course chapter quizes (to help students during the course) and then a final course quiz  which is where the "grading" is calculated.. Only issue now is that any chapter questions that have been answered are already "answered" in the final quiz which will be an issue. I need to ensure that any questions answered during the course are cleared when the final course is started.. Any help would be useful, I expect that there needs to be a "clear all" option available when the final quiz is taken. Using this addition below... `add_filter('wplms_course_student_marks','student_marks',999,3); function student_marks($student_marks,$id,$user_id){ $curriculum=bp_course_get_curriculum_units($id); if(get_post_type($curriculum[(count($curriculum)-1)]) == 'quiz'){ $student_marks=get_post_meta($curriculum[(count($curriculum)-1)],$user_id,true); } return $student_marks; } add_filter('wplms_course_maximum_marks','total_marks',999,3); function total_marks($total_marks,$id,$user_id){ $curriculum=bp_course_get_curriculum_units($id);//vibe_sanitize(get_post_meta($id,'vibe_course_curriculum',false)); if(is_numeric($curriculum[(count($curriculum)-1)])){ if(get_post_type($curriculum[(count($curriculum)-1)]) == 'quiz'){ $questions = vibe_sanitize(get_post_meta($curriculum[(count($curriculum)-1)],'quiz_questions'.$user_id,false)); if(!isset($questions) || !is_array($questions)) $questions = vibe_sanitize(get_post_meta($c,'vibe_quiz_questions',false)); $total_marks = array_sum($questions['marks']); } } return $total_marks; }`