Newborn babies: A study conducted by the Center for Population Economics at the University of Chicago studied the birth weights of 681 babies born in New York. The mean weight was 3513 grams with a standard deviation of 911 grams. Assume that birth weight data are approximately bell-shaped. Part 1 of 3 (a) Estimate the number of newborns whose weight was less than 4424 grams. Approximately of the 681 newborns weighed less than 4424 grams. Part 2 of 3 (b) Estimate the number of newborns whose weight was greater than 1691 grams. Approximately of the 681 newborns weighed more than 1691 grams. Part 3 of 3 (c) Estimate the number of newborns whose weight was between 3513 and 5335 grams. Approximately of the 681 newborns weighed between 3513 and 5335 grams.