A sample of the salaries of assistant professors on the business faculty at a local university revealed a mean income of $128,000 with a standard deviation of $9,800. 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 $118,200 and $137,800?

b. Approximately what percentage of the salaries fall between $108,400 and $147,600?

c. Approximately what percentage of the salaries are greater than $147,600?