<prompt> Translate the following text to SwahiliTwo features of the cumulative case study, shown in table 3.7, are the case survey method just described as a means of aggregating findings Lucas, 1974; Yin and Heald, 1975; Yin et al.  <response>: Kwa mfano, utafiti wa kesi ya jumla CUMULATIVE CASE STUDIE unaonyesha kwamba utafiti wa kesi unafanywa kwa njia ya jumla Yin na Heald, 1975; Lucas, 1974; Yin et al., 1975. 