According to a report from a business intelligence company, smartphone owners are using an average of 21 apps per month. Assume that number of apps used per month by smartphone owners is normally distributed and that the standard deviation is 7. Complete parts (a) through (d) below. A)If you select a random sample of 36 smartphone owners, what is the probability that the sample mean is between 20.5 and 21.5? B)If you select a random sample of 36 smartphone owners, what is the probability that the sample is between 20 and 21? C) If you select a random sample of 144 smartphone owners, what is the probability the sample is between 20.5 and 21.5?