CNNBC recently reported that the mean annual cost of auto insurance is 989 dollars. Assume the standard deviation is 246 dollars, and the cost is normally distributed. You take a simple random sample of 38 auto insurance policies. Round your answers to 4 decimal places. a. What is the distribution of X? X-N b. What is the distribution of ? - NG c. What is the probability that one randomly selected auto insurance is more than $1048? d. a simple random sample of 38 auto insurance policies, find the probability that the average cost is more than $1048. e. For part d), is the assumption of normal necessary? O No Yes