4. You are conducting a cohort study to examine the association of cataract surgery with incidence of traffic accidents. Periodic interviews with study participants allow you to ascertain the number of miles each one has driven during the 2-year follow-up period. Results of the study are below: Cataract surgery Yes No N (persons) Number of traffic Number of miles accidents driven 174 27 5,677,867 103 23 2,569,639 Assume that the two groups of study participants are comparable with respect to characteristics that predict the likelihood of a traffic accident and that there is no misclassification of the exposure (cataract surgery). a. Estimate the effect of cataract surgery on the rate of traffic accidents while driving b. Estimate the overall effect of cataract surgery on the risk of traffic accidents (i.e. that which would include a possible influence of the surgery on driving behavior) 4. You are conducting a cohort study to examine the association of cataract surgery with incidence of traffic accidents. Periodic interviews with study participants allow you to ascertain the number of miles each one has driven during the 2-year follow-up period. Results of the study are below: Cataract surgery Yes No N (persons) Number of traffic Number of miles accidents driven 174 27 5,677,867 103 23 2,569,639 Assume that the two groups of study participants are comparable with respect to characteristics that predict the likelihood of a traffic accident and that there is no misclassification of the exposure (cataract surgery). a. Estimate the effect of cataract surgery on the rate of traffic accidents while driving b. Estimate the overall effect of cataract surgery on the risk of traffic accidents (i.e. that which would include a possible influence of the surgery on driving behavior)