3. The figure below illustrates a study of 10 immunocompromised individuals. The time period during which each individual was followed up in the study is indicated with a blue line. The day an individual contracted influenza while being in the study is indicated with a diamond. a. Calculate the total person-time contributed by all participants in the study and interpret your result. To receive full credit, show your calculations and include the population, outcome, and follow-up period in the interpretation of your results. b. Calculate the incidence rate of influenza over the 40-day follow-up period and interpret your result. To receive full credit, show your calculations and include the population, outcome, and follow-up period in the interpretation of your results. C. Calculate the cumulative incidence of influenza over the 40-day follow-up period and interpret your result. To receive full credit, show your calculations and include the population, outcome, and follow- up period in the interpretation of your results.

Fig: 1