1. Theresa is conducting a study where she is following 30 people for 2 months and is documenting who gets diseased and who does not. Ten people in her study get the disease in 1 month. How much person-time has been accumulated in this study? 2. What is the Incidence density rate of the disease that Theresa is measuring? 3. Karrington is studying the relationship between using handrails at East Bay and getting a cough. She follows 10 people over two months. One of the people she studies is in a wheelchair and does not use handrails. The other 9 use handrails, and 2 of them get a cough. What is the cumulative incidence of cough in the population? 4. Selena is studying the relationship between educational achievement and breastfeeding initiation. She follows 30 new mothers over 2014 and found that about 83% of women initiate breastfeeding or 25 women. At the beginning of follow-up, one of the babies was adopted at birth and therefore that birth-mother not did not have the opportunity to breastfeed. What is the cumulative incidence of breastfeeding in this population over the 12 months?