Question: The weights of newborn babies vary according to a normal distribution with mean of 7.5 pounds and standard deviation 1.25 pounds. A newborn baby with a weight less than 5.0 pounds is considered as having a low birth weight.

1. If an individual is selected, find the probability that the individual’s birth weight is less than 5.0 pounds.
2. If a sample of 2 babies is selected, find the probability that their average birth weight is less than 5.0 pounds.
3. If a sample of 4 babies is selected, find the probability that their average birth weight is less than 5.0 pounds.
4. What is the maximum weight of the bottom 1% of newborn babies? A diagram will help.
5. What is the minimum weight of the top 1% of newborn babies? A diagram will help.

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