. In an experiment to study the dependence of hypertension on smoking habits, the following data were collected on 180 individuals:

Smoking Status

Nonsmoker

Moderate Smoker

Heavy Smoker

Hypertension Status

Hypertension

21

36

30

No Hypertension

48

26

19

What is the probability that a randomly selected individual is experiencing hypertension? Given that a heavy smoker is selected at random from this group, what is the probability that the person is experiencing hypertension? Are the events "hypertension" and "heavy smoker" independent? Give supporting calculations.