The Medical Records of Infants Delivered at Kaiser Memorial Hospital

The medical records of infants delivered at Kaiser Memorial Hospital show that the infants' lengths at birth (in inches) are normally distributed with a mean of 20 and a standard deviation of 2.6. Round your answers to four decimal places, if necessary.
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Find the probability that the length of an infant selected at random from among those delivered at the hospital is more than 22 in.
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Find the probability that the length of an infant selected at random from among those delivered at the hospital is less than 18 in.
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Find the probability that the length of an infant selected at random from among those delivered at the hospital is between 19 and 21 in.
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