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For questions 6-9, use the following information. The birthweight of newborn babies in the US are normally distributed with a mean weight of 7.7 lbs and a standard deviation of 0.8 lbs. 6. What is the interval that contains 95% of all newborn baby weights? 7. What percentage of newborn baby weights are between 6.9 lbs and 8.5 lbs? 8. In which percentile is a newborn baby that weights 6.1 lbs? What does this mean? 9. Find a z-score for a newborn baby that weighs 7.3 lbs. What does this z-score indicate