Help me on this. I’d appreciate it

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.

When y’all answer can y’all explain too !

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?