1. (15 points) Consider the sliding windows described in class. Assume m = 3, the window size s always kept at its maximum, and the GBN protocol is used. Further assume the sending window shows the following sequence numbers of the packets that are already transmitted: 1234567 Answer the following parts. Treat the parts independently. a. Assuming ACK3 has been received, what will be the content of the updated window? b. What would be the sequence numbers of the new packets (in proper order) that could be sent if ACK5 were received