(b) In the diagram below, Host A is sending data to the Server. Host A Server Source: Dest: Seg: Ack: 150 bytes 1028 23 150 210 Ack: 20 Source: Dest: A1 A2 seg: 210 300 Source: Dest: Seg: ACK: ... 150 bytes 1028 23 A3 A4 (i) Identify the values labelled Al to A4 in the diagrams. (ii) What is the window size in this communication? (iii) Identify the application being used from the port number. [4 marks] [1 mark] [1 mark]