6. (12 pts.) We want to distribute a file of size F = 6 Gbits to each of these 9 peers. Suppose the server has an upload rate of us = 60 Mbps. file F server Internet dy UN dy all The 9 peers have upload rates of: ui = 21 Mbps, u2 = 15 Mbps, u3 = 30 Mbps, 14 = 23 Mbps, u5 = 17 Mbps, 16 = 16 Mbps, uz = 28 Mbps, us = 10 Mbps, and u9 = 24 Mbps The 9 peers have download rates of: d = 20 Mbps, dz = 24 Mbps, d3 = 33 Mbps, du = 11 Mbps, da = 33 Mbps, do= 11 Mbps, d = 27 Mbps, ds = 39 Mbps, and do = 26 Mbps (a) (4 pts). What is the minimum time needed to distribute this file from the central server to the 9 peers using the client-server model? (b) (2 pts). In question (a), what is the root cause of this specific minimum time? (c) (4 pts). What is the minimum time needed to distribute this file using peer-to-peer download? (d) (2 pts). In question (c), what is the root cause of this specific minimum time