A sample of the salaries of assistant professors on the business faculty at a local university revealed a mean income of $113,000 with a standard deviation of $11,600. Assume that salaries follow a bell-shaped distribution. Use the empirical rule to answer the following questions. a. Approximately what percentage of the salaries fall between $101,400 and $124,600 ? b. Approximately what percentage of the salaries fall between $89,800 and $136,200 ? c. Approximately what percentage of the salaries are greater than $136,200