The figure at the top left of the next page is from the Fall 2008 Census Enrollment Report at Cal Poly, San Luis Obispo. It uses both a pie chart and a segmented bar chart to summarize data on ethnicity for students enrolled at the university in Fall 2008. 

a. Use the information in the graphical display to construct a single segmented bar chart for the ethnicity data. 

b. Do you think that the original graphical display or the one you created in Part (a) is more informative? Explain your choice. 

c. Why do you think that the original graphical display format (a combination of pie chart and segmented bar chart) was chosen over a single pie chart with 7 slices?