Okay, let me start by saying I am a newbie at this stuff. My room is partially set up and I'm at the ventilation part, and I am STUCK =(

I have:
25 feet of 6 inch ventilation tubing
6 6 inch ventilation clasps (to make for a more secure connection)
a thing that is going to connect to the floor (intake) to the six inch tube
two elbows so I won't need to bend the tubing

I am going to drill a six inch hole in the ceiling of the room (which is the attic)
Outtake will go up there, I have done my fair share of research and I feel this will work just fine.
Here are my questions:

a.) I just went to Home Depot and couldn't find anything that could be placed in the six inch hole, and then have the tube attached to it. What is this called? It's pretty much just a six inch tubing correct?
b.) How does that tube stay suspended in the ceiling? Do I screw driver it in to a stud... thus meaning my outtake hole has to be near studs?
c.) I need a six inch fan to suck air out of the room into the attic... does this fan technically go INTO the tube... if not, where does it go?
d.) I need some sort of fan that will pull air in as well, so same question as C
Thanks appreciate the help.

b.)
razzapiggy Reviewed by razzapiggy on . Ventilation Question... 2000 watt grow... Okay, let me start by saying I am a newbie at this stuff. My room is partially set up and I'm at the ventilation part, and I am STUCK =( I have: 25 feet of 6 inch ventilation tubing 6 6 inch ventilation clasps (to make for a more secure connection) a thing that is going to connect to the floor (intake) to the six inch tube two elbows so I won't need to bend the tubing I am going to drill a six inch hole in the ceiling of the room (which is the attic) Outtake will go up there, I Rating: 5