<prompt> unaweza kugeuza matini haya ya swahilikwa kiingereza?utafiti huu yakinifu ni wa tatu uliofanywa kwa mradi unaofuata 2nd ambayo ilifanywa kuanzia 1991 na gibb, kampuni ya ushauri iliyoko mauritius, na 1st ambayo imetokea 1972.  <response>: this feasibility study is the third carried out for the project following the 2nd which was carried out starting from 1991 by gibb, a consultancy firm based in mauritius, and the 1st which dates back to 1972. 