A CSMA network with two stations A and B, has an end-to-end propagation delay of 5 μs. StationA has data to send and station B does not have any data to send.A. If 0.5 persistent, slotted, CSMA is being used, what is the probability that station A will sendits data within 20 μs? Explain your answer for full credit. Assume the packet fits into 1 slot.Now suppose stations A and B both have data to send and are using 0.5 persistent, slottedCSMA. What is the probability that both stations have transmitted after 3 slots?