<prompt> Translate the following text to SwahiliDue to the inherent uncertainty surrounding long-term projections, the Trustees reports also include two other sets of assumptions, a high-cost and a low-cost alternative.  <response>: Kwa sababu ya kutokuwa na uhakika wa asili kuzunguka makadirio ya muda mrefu, ripoti za Wadhamini pia ni pamoja na seti nyingine mbili za dhana, mbadala wa gharama kubwa na mbadala wa gharama nafuu. 