Thanks for the questions. What you are doing here that is causing problems is that you are trying to figure out how these problems would work in the real world. In doing that, you are ignoring what the author actually is saying, and the whole goal is to identify exactly what the author
is thinking. For more on that general idea, please see this prior post I made about it: http://forum.powerscore.com/lsat/viewto ... 557#p10557
Looking at your specific questions, let's start with #3. What is the conditional indicator? The word "if" is the big one, and you should almost think about that as if it is blinking in red neon
Once I see that word, I know that what comes after it is sufficient (WG + AC), and then the last part is the necessary condition (RS). And in that way I see the relationship quickly and easily, and you might notice I don't even stop to think about how weather affects a race, etc. In other words, I ignore what I think about those topics in the real world, and just use the language of the author to determine what was said.
Now look at #5--where is the "if?" Same things as the above and then we follow the same reasoning to diagram the statement.
In #7 the "if" moves into the middle of the sentence, but other than that the same reasoning is applied.
The rule here is: follow the indicators because they tell you what that author is saying. Do not try to think about how ti would work in the real world because not all of the statements made by LSAT speakers mirror the real world.
Please let me know if that helps. Thanks!