CNNBC recently reported that the mean annual cost of auto insurance is 1028 dollars. Assume the standard deviation is 211 dollars, and the cost is normally distributed. You take a simple random sample of 9 auto insurance policies. Round your answers to 4 decimal places. a. What is the distribution of X? X-NO b. What is the distribution of ? - N c. What is the probability that one randomly selected auto insurance is less than $1019? d. a simple random sample of 9 auto insurance policies, find the probability that the average cost is less than $1019. e. For part d), is the assumption of normal necessary? O Yes No