The Bantu language called Yaka is spoken primarily in the Democratic Republic of the Congo and in Angola. It has been relatively heavily studied for its systems of vowel and nasal harmony, with some notable analyses coming from Larry Hyman of UC Berkeley. The following adapted dataset? briefly approximates the relevant phenomena of Yaka. Root Meaning Perfective sil/ 'deforest /sılılı/ /kim/ ‘moan /kımıni/ /jud/ ‘spread' /judili/ /nun/ "bow' /nunini/ /kud/ 'bury' /kudili/ For all questions you can assume that the above is in IPA, and therefore all properties of phones given in properties. pl also hold true for Yaka. 1. Examine the data and provide a rough analysis for Yaka perfectives. In particular, say why the following is true:
(a) The suffix may contain as its sole consonant an /1/ or an /n/. What governs this alternation?
(b) The suffix contains two vowels which always match, but they may be both /i/ or both /1/. What governs this alternation?
2. Write a principled model in Prolog of this phenomenon. Assume that the lexicon contains all five root forms and a single perfective suffix. Your program should generate all of the surface forms shown in a principled way. Include some prose about your code which details your approach (i. e. tell us in a few sentences what is actually happening in your code). Hint: You will probably want to use an underyaka/2 predicate, similar to the underenglish/2 predicate shown in lecture for nasal assimilation.