Your team is examining the number of cigarettes smoked per day in this sample and sex-specific death rate per 1000 per year among CHF patients admitted to the hospital. The following table shows the results that you obtained.

Cigarettes/Day	Death Rate/1000/Year due to CHF Males	Death Rate/1000/Year due to CHF Females
0	0.01	0.008
1-14	0.27	0.11
15-24	1.23	1.15
25+	2.00	1.50

A. Your team would like to calculate the attributable risk or attributable proportion of CHF death rates due to smoking 1-14 and 15-24 cigarettes per day separately for males and females. Do you notice any differences within and between these groups in death rates due to CHF based on the different number of cigarettes smoked per day?

B. What can the team conclude about the death rate due to CHF for males and females separately when zero cigarettes per day are smoked? How do they compare?