3-16 The sample space of a random experiment is fa, b, c, d, e, f}, and each outcome is equally likely. A random variable is defined as follows: Outcome a b C d e f X 0 0 1.5 1.5 2 3 Determine the probability mass function of random variable X. Use the probability mass function to determine the following probabilities. (a) P(X = 0), (b) P(0.7 4), (d) P(-1