This is two standard deviations below. This is two standard deviations above. Well, that's pretty straightforward. The empirical rule tells us, between two standard deviations, you have a 95% chance of getting that result. Or a 95% chance of getting a result that is within two standard deviations. So the empirical rule just gives us that answer. And then finally, part C. The probability of having a one-year-old US baby girl more than 12.8 kilograms.