Frames of 2000 bits are sent over a 2-Mbps channel using a geostationary satellite whose oneway propagation time from earth is 250msec. Ack's transmission time is negligible. Three-bit sequence numbers are used to represent frame numbers. A. What is the link utilization (channel efficiency) for Stop-and-wait? B. What is the maximum achievable link utilization? Hints: Use max window size for three-bit frame no. Note: you must consider round trip propagation time, which is twice the one-way time