Consider a bus LAN with a number of equally spaced stations with a data rate of 10 Mbps and a bus length of 1 km. Assume a mean distance between stations of 0.275 km. This is an approximation based on the following observation. For a station on one end, the average distance to any other station is 0.5 km. For a station in the center, the average distance is 0.25 km. With this assumption, the time to send equals transmission time plus propagation time. What is the mean time to spend a frame of 1000 bits to another station, measured from the beginning of transmission to the end of reception? Assume a propagation speed of 100 m/μs