The following questions refer to Table 2A-1 in Appendix 2 at the end of Chapter 2 (4th edition) a. Calculate the percentage decline in the death rate for all causes. What generalizations can be made about changes in disease rates that have occurred between 1900 and the present? b. Contrast changes in death rates due to cancer, heart disease, and cerebral vascular disease. What additional information would be useful to specify better the changes in these conditions? c. Note the decline in mortality for the four communicable diseases (1,2,3 and 10). With the exception of pneumonia and influenza, these are no longer among the top 10 leading causes of death. Can you speculate regarding how much of each is due to environmental improvements and how much to specific preventive and curative practices? d. Among the 10 leading causes of death in 2003 where chronic lower respiratory disease (43.5 per 100,000–rank 4), diabetes (25.5 per 100,000–rank 6), Alzheimer′s disease (21.8 per 100,000–rank 8), and spetisemia (11.7 per 100,000–rank 10). (Note: Data are not shown in Table 2A-a). In 1900, these were not among the 10 leading causes of death. How do you account for these changes? Table 2A-1 Leading Causes of Death and Rates for Those Causes in 1900 and 2003, United States