Assume that females have pulse rates that are normally distributed with a mean of75.0 beats per minute and a standard deviation of12.5 beats per minute. Complete parts (a) through (c) below. a. If 1 adult female is randomly selected, find the probability that her pulse rate is less than 79 beats per minute? The probability is?(Round to four decimal places as needed.) b.If 9 adult females are randomly selected, find the probability that they have pulse rates with a mean less than 83 beats per minute. c. Why can the normal distribution be used in part (b), even though the sample size does not exceed 30?