Exercise 4.1.4 in Applied Statistics & Probability for Engineers, 7th Ed. 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).

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