2. Consider a wired communication network of strategic importance. As shown in the figure below, the network consists of 3 stations: A, B, and C, and 3 links: L1, L2, and L3. Messages can be communicated from station B to station C, using either link L2 or link L3. Messages from station A can be communicated to station C by using either of the combinations, {L1, L2} or {L1, L3}. Assume that the reliability {defined as 1 probability of failure) of links L1, L2 and L3 is H196, 80%, and 60% respectively. Assume that the probability of failure of each link is independent of that of any other link. Parts a, b and c Part d a. Only for this part of the problem, assume that a message dispatcher is not aware of whether or not any link in the network has failed. For a single attempt at dispatching a message from station A to station C, assume that a message dispatcher randomly chooses between links L2 and L3 with probability 50% each. What is the probability that the message actually gets delivered to station C in that single attempt