5. Consider a scenario in which Host A wants to simultaneously send packets to Hosts B and C. A is connected to B and C via a broadcast channel- a packet sent by A is carried by the channel to both B and C. Suppose that the broadcast channel connecting A, B and C can independently lose and corrupt packets (and so, for example, a packet sent from A might be correctly received by B, but not by C). Design a stop-and-wait-like error-control protocol for reliably transferring packets from A to B and C, such that A will not get new data from the upper layer until it knows that both B and C have correctly received the current packet. Give FSM descriptions of A and B. (Hint: The FSM for C should be essentially the same as for B.) Also, give a description of the packet format(s) used