For all of the following questions, use this data:

the incidence rate per 100,000 per year for lung cancer is 7 among nonsmokers and 71 among smokers. the incidence rate per 100,000 per year for coronary thrombosis is 422 among nonsmokers and 599 among smokers. the prevalence of smoking in the population is 55%.

a) what is the percent population attributable risk of coronary thrombosis due to smoking?

b) so based on your calculations, if you could magically stop everyone from smoking tomorrow, which disease would show a larger drop in incidence (be sure to explain your answer)?