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1. Consider the Figure that shows the arrival time of eight messages for transmission on different nodes that share the same communication channel. The arrival time of each message is t = (0.4, 0.8, 1.5, 2.4, 3.1, 3.2, 4.7, 4.9) and the time to transmit a message is a unit of time. At what times are messages sent considering that all nodes run the (i) Slloted Aloha (ii) Pure Aloha protocol?

2. Consider again the Figure and the message arrival times t = (0.4, 0.8, 1.5, 2.4, 3.1, 3.2, 4.7, 4.9), which messages are completely successfully sent if all nodes run the (i) CSMA protocol ( ii) CSMA/CD?

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