#Write a for-each loop that lists each character in #mystery_string with its index. For example, if the string #was "David", the output would be: #0 D #1 a #2 v #3 i #4 d # #Note that the first item is #0, the second is #1, and so #on! We'll talk about why that is in Unit 4. # #Hint: You'll need a separate variable to keep track of how #many letters you've printed! You may not use the range #function on this problem.