Each salesperson at Puchett, Sheets, and Hogan Insurance Agency is rated either below average, average, or above average with respect to sales ability. Each salesperson is also rated with respect to his or her potential for advancementeither fair, good, or excellent. These traits for the 500 salespeople were cross-classified into the following table

a. What is this table called?

b. What is the probability a salesperson selected at random will have above average sales ability and excellent potential for advancement?

c. What is the probability a salesperson selected at random will have below sales ability given that he has a good potential for advancement?