An association that supports people who research, design, and evaluate the user experience of products and services periodically conducts a salary survey of its members. one of the authors of the report investigated how much having a ph. d. affects salaries of people in the profession. the author fit a first-order multiple regression model for salary (y, in dollars) as a function of years of experience (x1), ph. d. status (x2- 1 if ph. d., 0 if not), and manager status (x3-1 if manager, 0 if not). the following prediction equation was obtained. y = 59,0943,293x1+ 16,160x2+ 11,841x3 a. predict the salary of a member of the association with 13 years of experience, who does have a ph. d, and is a manager $ 129904 (round to the nearest dollar as needed.) b. predict the salary of a member of the association with 13 years of experience, who does not have a ph. d., and is not a manager s(round to the nearest dollar as needed.)