The percentage of private-industry jobs that are managerial has steadily declined in recent years as companies have found middle management a ripe area for cutting costs. How have women and various minority groups fared in gaining management positions during this period of corporate downsizing of the management ranks? Relevant data are listed in the file P2_75.XLS. Generate scatterplots and/or time series plots using these data to make general comparisons across the various groups included in the set.