According to a poll, cholosterol levels in healthy adult citizens of a major city average about 210mg/dL with a standard deviation of 35mg/dL and are roughty Nor distributed. The cholesterol levels of a sample of 44 heailty adults is taken. Completo parts a through d. a) What is the probability that the mean cholosterol level of the sample will be no more than 210 ? (Type an integer or a decimal. Round to three decimal places as needed.)