$1-15.($Employee turnover$)$ Turnover is costly to employers and efforts must be made to keep it in check. For that to happen, employers must learn how to achieve this goal based on facts in the form of pertinent data that relates to the work experience of the employees during their tenure the company$($a$)$ What specific information $($data$)$ should be sought after and how should it be gathered and maintained.$($b$)$ How should the collected data be analyzed for the purpose of reducing turnover in the company?