As shown in the following figure, a client is behind an NAT router. Assume that the client initiates a TCP connection request with a source port 1234 to the server with port 80. Further suppose NAT router assigns a port 5678 for the TCP session. (2%+2%+2%+2%) Cient NAT Server 10.0.0.20 Private 210.10.10.10 Private IPO Network Internet 0140.113.24.1 Public IP 10.0.0.254 Answer the following question in the form of [source IP, destination IP | source port, destination port]. (a) The request sent by the client before passing NAT router. (b) The request sent by the client after passing NAT router. (c) The reply sent by the server before passing NAT router. (d) The reply sent by the server after passing NAT router