function clearA($param = null)
 {
     $checking = $this->paramChecking($param);
     $data = new FormData($param['u'], $param['uid']);
     $data->clearPartAEntry($param['qid']);
     $data->updateData("part_a_overall_score", NULL);
     $data->updateData("part_a_total", NULL);
     $data->updateData("part_a_b_total", NULL);
 }