4 at we are acquainted with SALT's Normal Distribution Calculator, we can model the left atrial diameter in healthy children ages 5 to 15. Use the Normal Distribution with mean / = 26.2 and ard deviation o = 4.5 to determine each of the following, rounded to four decimal places. Approximately what proportion of healthy children have left atrial diameters greater than 30 mm? P(x 2 30) = Approximately what proportion of healthy children have left atrial diameters between 19 and 37 mm? P(19