Please answer all parts

Assume that females have pulse rates that are normally distributed with a mean of |.| = ?5.0 beats per minute and a standard deviation of 0 =12.5 beats per minute. Complete parts (a) through {6) below. a. lf'l adult female is randomly selected, nd the probability that her pulse rate is between 69 beats per minute and 81 beats per minute. The probability is . (Round to four decimal places as needed.) b. If 16 adult females are randomly selected, nd the probability that theyI have pulse rates with a mean between 69 beats per minute and 81 beats per minute. The probability is . (Round to four decimal places as needed.) 1:. Why can the normal distribution be used in part (b), even though the sample size does not exceed 30? O A. Since the mean pulse rate exoeeds 30, the distribution of sample means is a normal distribution for any sample size. 0 B. Since the distribution is of sample means, not individuals, the distribution is a normal distribution for any sample size. 0 6. Since the distribution is of individuals, not sample means, the distribution is a normal distribution for any sample size. 0 D. Since the original population has a normal distribution, the distribution of sample means is a normal distribution for any sample size