At the end of 2010, 58 new cases of acute lymphocytic leukemia (ALL) were reported among the 2,480 inhabitants of Santa Claus, Indiana. In the next year, a cohort study was conducted among 450 participants who were followed for 5 years. Of these participants, 144 had exposure to radiations at baseline of whom 21 developed ALL during the study period. Only 6 of the participants who did not have exposure to radiations at baseline developed ALL by the end of the study. Assuming that none of the participants were lost to follow up, calculate The incidence of ALL in the unexposed group for this study. (5 points) The incidence of ALL in the population mentioned in this study. (5 points) The population attributable fraction (population attributable risk percent) for radiations on the incidence of ALL