2. Consider the model from Chapter 19 for the spread of a new behavior through a social network. Suppose we have the social network depicted in Figure 19 suppose that each node starts with the behavior B, and each node has a threshold of q for switching to behavior A. (a) Now, let c and d form a two-node set S of initial adopters of behavior A. If other nodes follow the threshold rule for choosing behaviors. which nodes will eventually switch to A? G ve a brief (1-2 sentence) explanation for your answer 604 CHAPTER 19. CASCADING BEHAVIOR IN NETWORKS Figure 19.27: Starting from nodes e and f, the new behavior A fails to spread to the entire graph