Sorry for the xpost from the shorthanded forum. I don't post much in the Beginners forum but I actually think this one belongs here more than in the SH forum. I hope to get some worthy responses/discussion

I'm going to describe a table situation I have trouble with and tell my thought process. I hope people are willing to comment on my thought process and questions (I numbered them);

So we're playing micro stakes with some tag/nits and some loose passives at the table.

1. The tag/nits fold a lot preflop and are straightforward postflop, so they don't really dictate my preflop hand choice in this situation.

Let's assume the loose passive has stats of 50/5/0.5.
2a. Am I right in my thinking on a fundamental level, that because villain is playing a weaker range, I can widen my range as well?
2b. Does this count both IP and OOP?

Let's say I'm CO, BTN and CO are standard TAG or nit and therefor don't bother me much, passive villain (50/5/0.5) is BB.
3a. What's an indication of the wideness of my range to open profitable? (type of answer I'm looking for is for example 30%, or 2/3 of his vpip, or 20-40%?)
3b. Am I right that opening stuff like A9,KT,QJ (generally cards with more cold equity, instead of implied odds hands like SC's) are the better choice against these opponents?

4 How do both 3a and 3b change when villain is playing 30/10/1 ?