Suppose that f(x) = x/8 for 3 < x < 5.
Determine the following probabilities:
(a) P(x < 4)
(b) P(x > 3.5)
(c) P((4 < x < 5)
(d) P(x < 4.5)
(e) P(x < 3.5 or x > 4.5)