Suppose four active nodes—nodes A, B, C and D—are competing for access to a channel using slotted ALOHA. Assume each node has an infinite number of packets to send. Each node attempts to transmit in each slot with probability . The first slot is numbered slot 1, the second slot is numbered slot 2, and so on.   (a) What is the probability that node A succeeds for the first time in slot 5?  (b) What is the probability that some node (either A, B, C or D) succeeds in slot 4? (c) What is the probability that the first success occurs in slot 3?  (d) What is the efficiency of this four-node system

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A: As per given information :- R1 = R2 = 10 Mbps R3 = 100 Mbps

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Network transmission cabling

A network is a collection of devices connected by communication links. A device can be a computer or any instrument capable of sending and receiving data or information formed by other nodes toward the network. A channel that connects people or things is known as a network. It sends the data from one place to another. It is the basic concept of a computer, network, and data communications.