What is the constant rate of in dollars per hour? hour 5 10 15 20 and 25 50 75 100

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.

Me. i can't figure out this question. give an explanation too. .

Math it's appreciated. (picture provided)