Assume there are two clients A and C, as well as one server B. Client A begins browsing the web with server B. In the meantime, client C starts another session with server B. Based on the segment you see in the figure, please provide possible source and destination port numbers. (a) The packet-2 segment from B to A and the packet-4 segment from B to C. (b) How many sockets will be used on the server side after both packets have been demultiplexed? Why? (c) How many sockets will be used on the server side after both packets are de-multiplexed on the server side if the above sessions use UDP instead of TCP? Why?