CS360 LAB4 Pre-WORK DO it on your own, Nothing DUE Network Programming using TCP Download files from samples/LAB4pre/ : server.c client.c The programs will be EXPLAINED and demonstrated in class (1): Modify client.c to send a line containing two numbers, e.g. 123 456 Modify server.c to compute the SUM of the numbers and reply 123 456 sum=579 (2): Modify server.c to be a multi-threaded server: When a client connects: fork a child: Parent: close the client socket descriptor; continue for another client to connect; child : handle the client requests; exit(0) when client disconnects