2. (35 points) Consider the sliding windows described in class. Assume SR protocol is used and the window stays at its maximum size. Assume the following packets have been already sent: 0 1234567 Furthermore, assume some acknowledgements are received in the following order: ACK1, ACK3, ACK6, ACK2, ACK5, ACKO, ACK4 Answer the following questions. Treat the questions independent of each other. Also your answers should show the sequence numbers in proper order. a. What is the value of m? b. What is the updated window (its contents) after ACK6 is received but before receiving ACK2? What is the updated window after ACKO is received but before receiving ACK4? What is the updated window after ACK4 is received? c. d