Most students who study daily do well

Most students who study daily have willpower

Therefore, some students who do well have willpower.

For question 7, I know that most could mean all here, but should we assume that mandrake-inspections ←s→ /mondays?

For question 5, couldn't it also be

21+ and in the USA → legal

/legal → /in the USA or /21+

For Question 3 I am confused about the translation rule. The indicator word is "unless" in "unless a bookstore generates high sales volume, it cannot get bulk discounts from publishers.

This just goes to /volume → /discount and discount → volume

But using the translation rule for group 3 with unless, I should negate the sufficient condition so I have volume and discount. I choose one to negate and now I have

/volume → discount which is wrong. Or /discount → volume, which is also wrong. Am I interpreting the translation rule wrong here?

I'm finding that I'm getting the correct answer often without writing all the things down. Is there really time to write things down like that, or are people just resorting to drawing things out when confused?

What are people doing with blind review? Are you just doing the question again to see if you got it wrong or just looking at the time? Is there a lesson somewhere with an explanation on how to approach practice questions most efficiently?