4. (4 marks) In a study of genetic susceptibility to lung cancer, it was found that for women aged 40-49 whose mothers had lung cancer, the probability of developing lung cancer over the next year of life was 0.09. The women were checked and classified as having lung cancer (case) or not, split by whether their mothers had lung cancer or not. The study involved n = 2857 women with results tabulated below: Mother had lung Mother did not have Total cancer lung cancer Case 196 10176 2072 Control BO 705 785 Total 276 2581 2857 (a) Based on this scenario, state whether we should use relative risk (RR) or odds ratio (OR) in assessing genetic susceptibility to lung cancer. Explain your reasoning for this decision based on the scenario. (1 mark) (b) Using the 95% C.I., do the hypothesis testing for assessing genetic susceptibility to lung cancer. Use 4 decimal points for all your calculations