Three stations A, B, and C use 1-persistent CSMA/CD random access protocol to transmit data on a bus. The end-to-end propagation delay of the bus is 10ms. Station A is located at one end of the bus, and stations B and C are together located at the other end of the bus. Frames arrive at the three stations and are ready to be transmitted at stations A,B, and C at the respective times tA=0,tB=5 ms, and tC=15ms. Frames require transmission times of 40ms. Answer the following questions: Use the timelines on page 1 to help you draw the transmission activity of the stations. State clearly any assumptions that you need to use. A B C