My answer is
2|4|8|16| 20 |21|22|23|24|25|26|27|28|29|30|31|32
%%% At time 5, the threshold is reached. Slow-Start ends and threshold/2 and cwnd= 1 MSS %%%
#of RTT = 17
17*RTT= 17*25= 425 msec
File size/the receiver window size=300/32= 6.25*425= 2762.5 msec
Am I right?