Metro Atlanta Rapid Transit Authority determines bus routes through the city according to an equal amount of time for completion of all routes. Periodically they check these route times by conducting independent surveys. The Lennox Square Route was sampled 45 times and showed an average completion time of 90 minutes with a standard deviation of 8 minutes. The SunTrust Park Route was sampled 40 times and showed an average completion time of 87 minutes with a standard deviation of 5 minutes. Construct a ninety five percent confidence interval estimate for the difference in the times required to complete both routes.