50 40 40 Number of Teenagers 20 20 30 30 10 1 2 1 3 4 Time Spent on Social Media Per Day (in hours) 5 5 Weights of newborn babies are normally distributed with a mean of 3420 grams and a standard deviation of 495 grams a What are the weights of newborn babies above and below 1 standard deviation of the mean? b Above and below 2 standard deviations? c Above and below 3 standard deviations? 6 Lengths of newborn babies are normally distributed with a mean of 20 inches and a standard deviation of 1 inch Estimate the percentage of newborn babies that are: a more than 22 inches