A 4-Gigabyte file needs to be distributed to each of the 5 hosts.

Suppose the server has an upload rate of u = 60Mbps.

The 5 hosts have upload rates of: u1 = 30 Mbps, u2 = 30 Mbps, u3 = 35 Mbps, u4 = 25 Mbps, and u5 = 20 Mbps.

The 5 hosts have download rates of: d1 = 50 Mbps, d2 = 40 Mbps, d3 = 35 Mbps, d4 = 45 Mbps, and d5 = 55 Mbps.

What is the minimum time in seconds needed to distribute this file using peer-to-peer model?