Subscribers to a local newspaper were asked whether they regularly, occasionally, or never read the business section, and also whether they had traded common stocks (or shares in a mutual fund) over the last year. The table given here shows proportions of sub- scribers in six joint classifications.

(a) What is the probability that a randomly chosen subscriber never reads the business section?

(b) What is the probability that a randomly chosen subscriber has traded stocks over the last year?

(c) What is the probability that a subscriber who never reads the business section has traded stocks over the last year?

(d) What is the probability that a subscriber who traded stocks over the last year never reads the business section?

(e) What is the probability that a subscriber who does not regularly read the business sec- tion traded stocks over the last year?