public static function getBatchDropoutsDepartment($batch, $departmentid)
{
$batchEnd = $batch + 100000;
$programids = Studentdropout::getDeptPrograms($departmentid);
return Studentdropout::select('studentid')->where('studentid', '>=', $batch)->where('studentid', '<', $batchEnd)->whereIn('programid', $programids)->get();
}
