[FTC]: Rookie Team Help

[BenB]

Hi, I am an alum from my schools robotics team and I continue to mentor remotely from my highschool. This year is our third year in FIRST and first year competing in FTC. I have a few questions, some of which ive asked my team, but they have been to busy to reply. I appologize in advance if any of my questions are answered in the manual. I have read it already, however I have not yet found these answers.

1) How long is the build period?
2) Are robots allowed to knock the opposing alliance's pucks down from the rack?
3) Can a robot play defence on an opposing robot trying to go back up the ramp for the extra 10 pts? Even in the last 30, 15, 10 seconds?
4) Can a robot possess opposing alliance's pucks?
5) Can pucks be descored from the central circle? The central triangle?
6) Do the kits come with tank treads of any sort? If so, what size are these and how many are there?
7) Is there a kit/instructions on building a cheap, practice FTC arena?
8) Is FIRST selling any of the game components, ie. the rack, the rollers, central triangle, the ramp, ect.
9) How high are the racks?
10) Is there a weight limit to the robots?

Thats all I can think of for now, sorry about the number of questions.

Thanks for your help!