The cholesterol levels of an adult can be described by a normal model with a mean of 181 mg/dL and a standard deviation of 23. a) Draw and label the normal model. OA. O B. OC. 89 135 181 227 273 158 170 181 193 204216 112 135 158 181 204 227 250 b) What percent of adults do you expect to have cholesterol levels over 190 mg/dL? 34.46 % (Round to two decimal places as needed.) c) What percent of adults do you expect to have cholesterol levels between 140 and 150 mg/dL? 17 % (Round to two decimal places as needed.) d) Estimate the interquartile range of cholesterol levels.