The contingency table below shows the results of a survey of video viewing habits by age. Find the following probabilities or percentages:

Video viewing platform preferred

Viewer Age

Mobile/laptop device

TV screen

Row total

18-34

55

50

105

35-54

25

22

47

55+

15

25

40

Column total

95

97

192

(1) Probability that a viewer is aged 18-34.

(2) Probability that a viewer prefers watching videos on a TV screen.

(3) Percentage of viewers who are 18-34 and prefer videos on a mobile or laptop device.

(4) Percentage of viewers aged 18-34 given that viewers prefer videos on a mobile or laptop device.

(5) Percentage of viewers who are 35-54 or prefer videos on a mobile or laptop device.