Birth weight, in grams, of newborn babies are normally
distributed with a mean of 3290 grams and a standard deviation of
520 grams. Find the percentage of newborns that weigh between 3000
and 4000 grams. Consider again the birth weights of newborn babies,
where the mean weight is 3290 grams and the standard deviation is
520 grams. Find the weight, in grams, that would separate the
smallest 4% of weights of newborns from the rest.