Yes, the best time are before lunch and before close
Yes, I walk there often! It doesn't matter what time I go!
Walk all you want. Enjoy the scenery.
I think groups meet up there in the morning and walk. At least they used too
You can walk around as much as you want in the mall. No one will say anything if you're doing walking laps in the mall.
I'm not sure.. it is open so I see no reason why you couldn't
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