2. Let X, Y, Z be binary random variables with joint distribution that factorizes over the directed graph X - Z - Y (v-structure). We define the following quantities: a =P(X = 1) b =P(X = 1/Z =1) c=P(X = 1/Z = 1, Y =1) (a) For all the following cases, provide examples of conditional probability tables (table CPDs), and compute a, b, c, such that: . a>c . a