A study of tweeting behaviour revealed that, among 36- to 45-year-olds, the number one tweeted topic relates to family, with 28% making some reference to it among those tweets that could be categorised in a mutually exclusive manner. Other tweets were categorised as referring to the arts (22%), entertainment (18%), education (17%) and sports (11%), while 4% referred to some other topic. If a tweet by a 36- to 45-year-old is randomly selected and able to be categorised in the same way, determine the probabilities of the following.

(a) The tweet is about family.

(b) The tweet is not about sports.

(c) The tweet is about the arts or entertainment.

(d) The tweet is neither about family nor about education.