A random variable is normally distributed with a mean of 25 and a standard deviation of 5. If an observation is randomly selected from the distribution, determine two values of which the smallest has 25% of the values below it and the largest has 25% of the values above it.
21.65 and 28.35
16.23 and 18.82
18.85 and 27.94
19.31 and 21.12