Consider a random variable X with associated probability function in Table 1. Which of the following values of ki and 2 does NOT define a probability function? Why ? (a) k1 = -0.2, k2= 0.27 (b) k1 = 0.3, k2 = 0.27 (c) k1 = 0.1, k2 = 0.27 X 0 1 2 3 f(x) K2 - K1 0.2 K1+ k2 0.26 Table 1