5 . You are a management consultant whose task is to do a utility analysis using the following information regarding secretaries at Inko, Inc. The validity of the Secretarial Aptitude Test (SAT) is 0.40, applicants must score 70 or better to be hired, and only about half of those who apply actually are hired. Of those hired, about half are considered satisfactory by their bosses. How selective should Inko be to upgrade the average criterion score of those selected by Zy = 0.5? What utility model did you use to solve the problem? Why?