Computer Communication Networks

Q 3 Consider a network where there are two paths between your computer and a video stream server (in practice might be many more). The total distance for the first path is 2000 km and the total distance for the second is 1500 km, and the path that each packet takes is randomly chosen. Assuming that there is no queueing delay, all the links run at the same data rate, and no packets are lost, how big should the playback buffer be? (Assume c= m/s)