Childhood leukemia, a hematological malignancy, is the most common form of childhood cancer, representing 29% of cancers in children aged 0 to 14 years in 2018. Imagine that you work in the State Department of Public Health, and 12 cases of childhood leukemia were diagnosed during a 10-year period. Assume that there are 12,000 children in the town throughout this 10 years, and that the national incidence rate of childhood leukemia is five cases per 10,000 person-years. What is the 95% confidence interval for the standardized morbid- ity ratio?