<prompt> Translate the following text to SwahiliHe suggests that processing and transportation of mail do not seem to be characterized by scale economies, and that they could be provided by competing firms.  <response>: Yeye anaonyesha kwamba usindikaji na usafirishaji wa barua haionekani kuwa sifa na uchumi wa kiwango, na kwamba wanaweza kutolewa na makampuni ya ushindani. 