A transport company employed a total of 9,882 people. Of these 3,120 were employed in areas where they were exposed to high levels of fine particulate matter from vehicle exhausts, while the remaining 6,762 were not exposed to fine particulate matter. At the beginning of the study, all employees were free from disease. The entire population of 9,882 was reassessed after 10 years to determine whether exposure to fine particulate matter increased the risk of developing cardiovascular disease. The findings at the 10-year assessment are provided in the table below. Cardiovascular disease Yes No Total Yes 520 2600 3,120 Particulate matter No 621 6141 6762 1141 8741 9882 a. Calculate the appropriate measure of frequency of disease for i. The exposed workers ii. The unexposed workers iii. All the workers 2.Calculate the appropriate measure of association and interpret your answer. 3 What proportion of cardiovascular disease in the exposed workers could be due to their particulate matter exposure? Please provide the answer as a percentage and interpret your