Given 4 = lOOOf 1 — jJtv ), determine each of the following:

(a) £o

(b) ^120

(c) <^33

(d) 20/?30

(e) 30^20

(f) The probability that a 25-year-old lives for at least 20 years and at most 25 years.

(g) The probability that three 25-year-olds all survive to age 80.