Let
greeting = 'Hello, world!'

(1) Use slicing to change the the letter o to captital O. Notice
there are two 'o's!  
Save the new string into the variable new_greeting and print it

(2) Instead of using slicing, now use for loop and conditional 
execution to do it.

For both questions, please provide your python command(s).

Submit an electronic copy solution in moodle before class on Feb 10th.
Submit a hardcopy solution in class on Feb 10th.