    Sentence.1: She will: first analyze: the ‘historical ‘data..by  ‘separating. the :causes‘of past-changes. in demaid ‘itd the  fallowing: (0) trend, (2 sedsonality:(3)-cycialty and: @)  random flectuation,    Senitencé. 2! Of the’. randein 'flictuation’ is: the most:  pioblematic foraialysts £