2. A university alumni office sent salary surveys to alumni who graduated 2 and 5 years ago. The voluntary responses received are summarized in the box-and- whisker plots shown in the figure. Graduated 2 years ago Graduated 5 years ago 60 60 50 50 40 40 30 30 a) From the figure, estimate the median and extreme values of salaries of alumni graduating 2 years ago. In what range are the middle half of the salaries? b) From the figure, estimate the median and the extreme values of salaries of alumni graduating 5 years ago. What is the location of the middle half of the salaries?