public static function getSelectedApplicantsForSchool($schoolId)
 {
     $db = Connection::getInstance();
     $mysqli = $db->getConnection();
     $query = "select * from studentApplicant s left join guardian g on g.NIC=s.NIC where selectedSchoolId='{$schoolId}';";
     $result = $mysqli->query($query);
     $appplicants = array();
     if ($result->num_rows > 0) {
         while ($row = $result->fetch_assoc()) {
             $applicant = new StudentApplicant();
             $applicant->setApplicantId($row["applicantId"]);
             $applicant->setFirstname($row["firstname"]);
             $applicant->setLastName($row["lastname"]);
             $applicant->setGender($row["gender"]);
             $applicant->setReligion($row["religion"]);
             $applicant->setDateOfBirth($row["dateofBirth"]);
             $applicant->setSelectedSchool($row["selectedSchoolId"]);
             $applicant->setGuardianNic($row["NIC"]);
             $applicant->setGuardian_lastname($row["g_lastName"]);
             $applicant->setGuardian_firstname($row["g_firstName"]);
             $applicant->setGuardian_contact($row["contactNumber"]);
             $appplicants[] = $applicant;
         }
     }
     return $appplicants;
 }