1) Why ?are ?informative ?presentations? useful?? Describe? and? give? examples? of? three ?major? functions ?of?informative ?presentations. 2) What ?is? a? topical ?pattern? of? organization?? What? types? of ?messages? would? work? well ?with? this ?pattern?? 3) How ?is? a? demonstrative ?presentation? organized?? What? are? its? strengths? and ?possible? weaknesses?