CrowB@R

 SO I just picked up a copy of Galactic civilizations 2 weeks ago and I'm absolutely Addicted. The $20 was well spent! I've been doing a lot of reading through these forums and on the GalCiv2 Wiki site, however I've got a few questions for some of the more experienced players about how to actually play the game.
 
Question 1: Bonus tiles can be found on certain planets and so far I've seen that they offer either 100% or 300% bonus to their respective field. Either Research, ManufacturinG, Approval, Economy. or Influence. Perhaps Diplomacy as well although I can't remember if there are bonus tiles for that. The main question is whether these bonus tiles apply to building a (capital) on them? For instance a technology Capital built on a Standard planet tile where they produce 20tp of research offers 50% increase in research thereby increasing the amount to 30tp per turn. By this logic If a Technology Capital is built on a bonus tile of 100% research bonus it would actually give a 500% increase. Im probably wrong but im curious whether I should be building capitals on the bonus tiles under this assumption.

Question 2: Does population affect the amount of production on a planet? Example: I fill a planet with all factories and my weekly manufacturing capacity  is a potential 60 MP. 10 factiories x 6 mp each= 60 mp per turn. Now If the planet is only inhabited by 500 Million ppl as it is when I first colonize it but has a population capacity of 12 Billion, is the actual manufacturing produced by the factories the same as the percentage of total population actually on the planet? Im sort of starting to understand the game mechanics a bit but Im just trying to figuire all this out so im not wasting loads of money and resources to build up planets only to have them wasting productivity by being overbuilt. Im aware that I have to dedicate all my funding to manufacturing as well as have my industry sl;iders to 100% to achieve full capacity but under these conditions does population affect this at all?

Srry preemptively if all this has been discussed before, but thanks in advance for any responses. Happy gamin!
CrowB@R