4. (25 points) We will call title case the condition when the first letter of every word in a string is upper case. Write a function named title casethat will convert a string to title case by capitalizing the first letter of every word. Non-first letters should be left unchanged. You may use the upper) function to convert a character to upper case. >>>text-"v" >text. upper () Please include a signature at the top of your function. Before submitting your work, verify that your function works correctly by testing it in Python's interactive mode with the following inputs: >>> title case ("hello") Hello' >>>title_case ("He ate all the avocados!") He Ate All The Avocados! >>>title_case ("and the BANANAS?") And The BANANAS