<prompt> Translate the following text to SwahiliPostal monopolies, like most other legal monopolies, are thought by many observers 1 to be technically inefficient, and 2 to have delivery functions which exhibit economies of scale.  <response>: Usalama wa posta, kama ujasusi mwingine wa kisheria, unafikiriwa na waangalizi wengi kuwa 1 haufai kiufundi, na 2 kuwa na kazi za utoaji ambazo zinaonyesha uchumi wa kiwango. 