Use the following information to answer questions 1-2. There were 250 students enrolled at the Kip City Public School at the beginning of the 2015-2016 school year. At the beginning of the year, school nurse records indicated that 42 of the students had asthma. During the school year (September 1 through June 30), 18 additional children were reported to have a diagnosis of asthma. No children were enrolled in the school or left the school during the school year. You can assume that an asthma diagnosis is permanent, so once a child is diagnosed, they are never cured. What was the baseline prevalence rate of asthma in this population at the beginning of the school year?