The age distribution for politicians in a certain country is shown in the accompanying table. Suppose that a politician is selected at random. Let eventsA, B,C, and S be defined as follows. Complete parts(a) through(d) below.

A= event the politician is under 50

B = event the politician is in his or her 50s

C =event the politician is in his or her 60s

S = event the politician is under 70

Age (yr) No. of politicians

under 50 8

50-59 31

60-69 33

70-79 15

80 and over 3