The Stop-and-Wait Protocol is being used for one-directional data transfer over a channel with bit errors and packet loss. The user wishes to transmit three characters 'U', 'S', and 'A', with each character in a separate packet. For each of the following scenarios, draw a timing diagram that shows the exchange of data packets and ACKs between the sender and receiver. Show the data content of packets, the sequence numbers used on all packets and ACKs, whether a packet contains new data or is a retransmission, and also show what data is delivered and at what time to the user at the receiving end. Also clearly show when a timeout occurs. Every alternate data packet is received with errors; all ACKs are received correctly. All data packets are received correctly; every' alternate ACK is lost