5. You conduct a cohort study and observe that coffee consumption is associated with a two-fold increased risk of lung cancer. In your study, smokers are more likely to drink coffee than non-smokers. Cigarette smokers have a higher risk of lung cancer than nonsmokers. a. Draw the confounding triangle: b. What is the impact of not controlling for the confounding factor? c. Describe in words what will happen when you adjust for the confounder.