On the assumption that these data are valid, and that an association between cigarette smoking and lung cancer exists, calculate the odds ratio of developing lung cancer among light, heavy, and chain smokers relative to non-smokers. Is there a suggestion of a dose-response relationship?

Amount of Cigarettes Smoking for 20+ Lung Cancer Cases Controls Years'\" % % 14-6 11-5 19-0 35-6 11-5 7-6 Total 100.0 100.0