Suppose in the connection-oriented communication it takes 50 second to establish a connection, after which a packet of up to 10 characters can be sent in 10 second over the connection, in either direction. Suppose A and B exchanges messages on this network. A initiates the communication and sends to B a message of 100 characters, which are partitioned into 10 packets. In reply, B sends a message of 50 characters, which are partitioned into 5 packets. Assuming that there is no delay other than the time it takes for establishing a connection and for packet transmission. How long does the session between A and B last