A sample of 87 one-year-old spotted flounder had a mean length of 126.31 millimeters with a sample standard deviation of 18.10 millimeters, and a sample of 132 two-year-old spotted flounder had a mean length of 162.41 millimeters with a sample standard deviation of 28.49 millimeters. Construct a 95% confidence interval for the mean length difference between two-year-old flounder and one-year-old flounder.