The accompanying table shows proportions of computer salespeople classified according to marital status and whether they left their jobs or stayed over a period of 1 year.

Time on job Marital Status Úone year 6 one year Married 0.64 0.13 Single 0.17 0.06

a. What is the probability that a randomly chosen salesperson was married?

b. What is the probability that a randomly chosen salesperson left the job within the year?

c. What is the probability that a randomly chosen single salesperson left the job within the year?

d. What is the probability that a randomly chosen salesperson who stayed in the job over the year was married?