X coordinate first, then y. (Have to crawl before you walk, x is down and y is up, so thats a good reminder.) And the garbage can is on that cooridinate so uh, yah. Hope this helps, have a nice day.
The mean of the answer is 20.5 because you add all of the number together and divide by 6 because there's 6 numbers. I'm sorry, but I don't know how to do the standard deviation... Hope this helped!