12. A study conducted by the Center for Population Economics at the University of Chicago studied thebirth weights of babies born the state of New York. The mean weight was 3234 grams with a standarddeviation of 871 grams. Assume that the birth weight data are approximately normal. Use the 68 95 99.7 rule to answer the following:a. What proportion of newborn babies weigh between 2363 and 4105 grams?___________________b. What proportion of newborn babies weigh less than 1492 grams?___________________

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