Describe what a "Hierarchical" file structure means. What is an inode? Unix directories only contain inode-filename mapping. Describe what this means. What is contained within the inode? Describe what is meant by a parent child relationship in Unix file system. When a directory is created, how many linked entries are created? Name the entries that are created. List the two methods used to specify the paths of files and/or directories. What is the primary reason for having a parent child relationship in the Unix file structure?