7. Consider distributing a file of F = 15Gbits to N peers. The server has an upload rate of u_s = 30Mbps, and each peer has a download rate of d_i = 2Mbps and an upload rate of u.

(a) (2 points) For N = 100 and u = 700Kbps, find the minimum distribution time for client-server distribution.

(b) (2 points) For N = 100 and u = 700Kbps, find the minimum distribution time for client-server distribution, find the minimum distribution time for P2P distribution.

c) (2 points) Suppose the number of peers increases to N = 1000, find the minimum distribution time for both client-server and P2P distribution.