1. Use the link and symlink functions to create both a hard link and a symbolic link to a file. Verify the success of each function call using perror. The command line for your program should be: cmd filename hard Link Name symbolicLinkName These will correspond to argv[1], argv[2] and argv[3]. Assign each of these to meaningful variable names. Then turn the 2nd argument into a hard link reference and the 3rd argument into a symbolic link. Do the following test cases using different file names for each case: a. filename exists and the other two files don't. b. The filename exists and the other two files also exist. C. None of the files exist. Summarize your results for each case indicating whether or not you were successful in creating the hard link and/or the symbolic link and whether your result was reasonable