1. Determine A-D in the following scenarios. Explain why briefly:

Host A Host B User types "XYZ Seq=2, ACK=9, data = "XYZ' (3 bytes) host ACKs receipt of "XYZ', echoes back 'XYZ Seq=A, ACK=B, data = 'XYZ (3 bytes) host ACKS receipt of echoed "XYZ Seq=C, ACK=D data = XYZ' (3 bytes) i ii lii. A= B= Ca iv. D