They are true/false, so you have to have some type of leaning, right? Answer them and we will see if the probability for your guesses lines up with pure chance. In doing this we may be able to address ii. and iv.
The way to learn statistics and any other subject follow:
1. learn the material.
2. Try to solve
3. Check your solution.
When you try solving yourself, even if your solution is wrong or you get into a dead-end, the fact that you tried to solve, makes you understand the solution much better.
If you really want to understand you can't skip any step ...