Nails

The number of nails of a given length is normally distributed with a mean length of 5.00 in. and a standard deviation of .03 in. Find the number of nails in a bag of 120 that are less that 4.94 in. long. Then find the number of nails in a bag of 120 that are between 4.97 and 5.03 in. long. Find the number of nails in a bag of 120 that are over 5.03 in. long.