Write a C program called copy that accepts two arguments called file1 and file2. If no argument is specified or only one argument is specified, the program should display a message to ask the user to enter two file names and then exit. In case two arguments are specified but there is no file1, the program must specify, copy cannot be performed and exit. If file1 exists but file2 does not exist, then the program must create file2 and copy the content of file1 into file2. If file2 exists, the program should ask if the user wants to overwrite or append to that file and then copy file1 to file2 as specified.