1. Find the lower bound of the best interval which includes about 95% of all the police officers salaries in an eastern state. 2. Find the upper bound of the best interval which includes about 95% of all the police officers' salaries in an eastern state. 3. Find the lower bound of the best interval which includes about 68% of all the police officers' salaries in a northern state. 4. Using the same principle, find the lower bound of the 95% interval for the mean difference between all the police officers in the two states. Note that the mean difference is $1,000, and the standard deviation of the mean difference is approximately $2,800. 5. Using the same principle, find the upper bound of the 95% interval for the mean difference between all the police officers in the two states. Note that the mean difference is $1,000, and the standard deviation of the mean difference is approximately $2.800.