For a certain group of individuals, the average heart rate is 74 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 4 decimal places and intermediate z-value calculations to 2 decimal places.


ABetween 71 and 75 beats per minute:

$P(71 < X < 75) =$


BHigher than 73 beats per minute:

$P(X > 73) =$


CLess than 78 beats per minute:

$P(X < 78) =$