K According to a poll, cholesterol levels in healthy adult citizens of a major city average about 215 mg/dL with a standard deviation of 30 mg/dl and are roughly Normally distributed. The cholesterol levels of a sample of 41 healthy adults is taken. Complete parts a through d a) What is the probability that the mean cholesterol level of the sample will be no more than 215? 0 (Type an integer or a decimal. Round to three decimal places as needed.)