Now suppose that there are M paths between the server and the client. No two paths share any link. Path k (k = 1, . . . , M ) consists of N links with transmission rates Rk1, Rk2, .. . , RkN. If the server can only use one path to send data to the client, what is the maximum throughput that the server can achieve'! If the server can use aU M paths to send data, what is the maximum throughput that the server can achieve?