Gys please answer me this 5 questions it's really really urgent...!!! 1,What is the command to list the contents of a directory in Unix and Unix-like operating systems? 2,What is the ls option that prints the author of a file? 3,What is the ls option to sort by file size? 4,What is the ls option to list entries by lines instead of by columns? 5,What is the option to output the version information of ls?