Question: Suppose several users share a 4 Mbps link, and each user demands 2 Mbps bandwidth when transmitting. The probability that a specific user is active

Suppose several users share a 4Mbps link, and each user demands 2 Mbps bandwidth when transmitting. The probability that a specific user is active is 0.5. If there are 4 users, what is the probability that the link can work without any congestion?

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