Help to attachment .zip .xlsm file and send email

[nhnn1986]

Hi all

I have Form like this: Điền Email để nhận file

And Script auto send email when Form Submit

function email() {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = ss.getSheetByName('NQ');
 
  var recipient = sheet.getRange(sheet.getLastRow(), 2).getValue();
  var subject   = 'Send file';
 
  var name      = sheet.getRange(sheet.getLastRow(), 3).getValue();
  var chinhanh      = sheet.getRange(sheet.getLastRow(), 4).getValue();
  var body      = 'hallo ' + name + ' - ' + chinhanh +', \r\n Download file belove';
  MailApp.sendEmail(recipient, subject, body);
}

Please help me email can attachment .rar file or .xlsm file.

Thanks