Suppose you are downloading a large file, and there is a progress bar showing how much of the file has been downloaded. For definiteness, assume the progress bar moves 1 mm per MB, the throughput averages 0.5 MB per second (so the progress bar advances at a rate of 0.5 mm/sec), and the winsize is 5 MB. A packet is now lost, and is retransmitted after a timeout. What will happen to the progress bar? If someone measured the progress bar at two times 1 second apart, just before and just after the lost packet arrived, what value would they calculate for the throughput?