1. Childhood lead poisoning is a public health concern in the United States. In a certain population, three children in ten have a high blood lead level (defined as 30 grams/liter or more). If six children are randomly selected, calculate the probability that less than 2 of the 6 of the children have a high blood lead level. 2. In a certain population, an average of 26 new cases of esophageal cancer are diagnosed each year. Find the probability that in the next year, there will be 25 diagnosed cases of esophageal cancer. 3. In a certain population, an average of 26 new cases of esophageal cancer are diagnosed each year. Find the probability that in the next month, there will be less than two diagnosed cases of esophageal cancer. 4. The partial pressure of oxygen, PaO2, is a measure of the amount of oxygen in the blood. Assume that the distribution of PaO2 levels among newborns has an average of 38 mm Hg and a standard deviation of 9, and that these readings have a normal distribution. What proportion of PaO2 readings are greater than 40 mm Hg?5. The partial pressure of oxygen, PaO2, is a measure of the amount of oxygen in the blood. Assume that the distribution of PaO2 levels among newborns has an average of 38 mm Hg and a standard deviation of 9, and that these readings have a normal distribution. What proportion of PaO2 readings are less than 75 mm Hg?