21. A set of scores measuring aggression is normally distributed with a mean equal to 23 and a standard deviation equal to 2.5. Find the proportion: 1. To the left of x = 19.0 2. To the right of x = 25.5 3. Between the mean and x = 19.0 4. To the left of x = 25.5 5. To the right of x = 19.0