Separate names with a comma.
It also lets you select the day and time that you'd like to see.
I believe that the answer is "yes", but you can just look in the System Information screen to find out for sure whether yours has been updated.
It's one of those kid-proof fences whose poles stick into small holes in the concrete. There are lots of those in Florida.
As far as the grass...
It asked you to type "yes" or "no" and you typed "y". If you take a look at the script, it's specifically matching against "yes".
Actually, I could have sworn that somebody inadvertenty called him "Vince" on the show and he corrected them. I can't find a real cast list, but...