8. Assume you are editing the main h file. Write a vim command to append the contents of 9. Assume you are editing the main h file. Write a vim command to change the case of 10. Assume you are running vim with no file. Write a sequence of vim commands that will main.cpp to the end of the main h file. Do not assume you know the contents of the main.cpp file every character, i.e. all lower-case characters become upper-case characters, and all upper-case characters become lower-case characters merge the main h and main.cpp files into a single file, and then write the merged file to "main.cpp" in your home directory