As you work with vi, your data is kept in a storage area. What is this storage area called? The vi editor operates in two principle modes: command mode and input mode. Describe each mode. How do you...

As you work with vi, your data is kept in a storage area. What is this storage area called? The vi editor operates in two principle modes: command mode and input mode. Describe each mode. How do you change from command mode to insert mode? How do you change from insert mode to command mode?