Will the opposite of a number always, sometimes, or never be greater than the number itself

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

What is not true about kl and mn? what is mn? (show your work)

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)