Answer:
Your left index finger should rest on the "f" key which can be found easily by using your touching senses because there is a bump on the "f" , and the "j" Key your right index finger should rest on the "j" Key, Your thumbs can rest on the space bar
Is there more to this or ?
Answer: A. Usability testing
Explanation:
Usability testing would be the correct answer because if the user interface isn't "frendly" then people won't be able to use it properly. Or if you are refering to the word friendly as looking safe, then even more so would be usability testing. Because if people don't like the fonts and styles of the user interface, they might not use it at all.
Answer:
binary computer natural language