<prompt> Translate the following text to SwahiliThe cumulative case study can be retrospective, aggregating information across studies done in the past, or prospective, structuring a series of investigations for different times in the future.  <response>: Uchunguzi wa kesi ya jumla inaweza kuwa retrospective, kukusanya habari katika masomo yaliyofanywa katika siku za nyuma, au prospective, kuunda mfululizo wa uchunguzi kwa ajili ya nyakati tofauti katika siku zijazo. 