Heart Rates For a certain group of individuals, the average heart rate is 70 beats per minute. Assume the variable is normally distributed and the standard deviation is 2 beats per minute. If a subject is selected at random, find the probability that the person has the following heart rate.Round the final answers to at least four decimal places and intermediate z-value calculations to two decimal places.(a) Between 67 and 71 beats per minuteP(67