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1. Consider the following network. The routers are independent from each other. Routers A, B, C and D are operational with probabilities 1/3, 2/5, 3/4

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1. Consider the following network. The routers are independent from each other. Routers A, B, C and D are operational with probabilities 1/3, 2/5, 3/4 and 1/2 respectively. a. What is the probability that computer 1 and communicate with computer 2? b. Given that the network is closed, what is the probability that Router B is operational? B Computer 1 A D-- Computer 2

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