In people without diabetes, mean glucose is normally distributed typically with mean 100 mg/dl and standard deviation 20 mg/dl. A blood sugar level less than 140 mg/dL (7.8 mmol/L) is normal. A reading of more than 200 mg/dL (11.1 mmol/L) after two hours indicates diabetes. A reading between 140 and 199 mg/dL (7.8 mmol/L and 11.0 mmol/L) indicates prediabetes. a. If we randomly selected a person who has normal blood sugar, what is the probability that his/her blood sugar level is greater than 150