14. Using the stratified data in Tables 3a and 3b, below, determine whether smoking is a confounder. of the association between pickled vegetable consumption and esophageal cancer in our hypothetical Linxian cohort. Calculate the risk ratios and 95% Cls. Show your work. Interpret the risk ratios and 95% Cls and explain your answer, Table 3.a Smokers No Esophageal Cancer Esophageal Cancer Total B Exposed to Picked 60 461 521 Vegetable Consumption Unexposed to 40 1342 1382 Picked Vegetable Consumption Total 100 1803 1903 Table 3.b Non-Smokers No Esophageal Esophageal Cancer Cancer Total Exposed to Picked 55 504 559 Vegetable Consumption Unexposed to 52 1486 1538 Picked Vegetable Consumption Total 107 1990 2097