[synnik]

I wouldn't be quite as harsh as people have recommended...

For one thing, getting an education includes learning how to solve your own problems. Your explanations of your solutions may help her gain that knowledge. Assuming that because someone is not a problem solver in their 2nd semester, that they never will be... well, that is just false logic.

Even if she never does learn to solve problems, she may still get a basic engineering job. But she will not become a senior level engineer.

Ultimately, you need to explain to her that her goal is not just to solve the problems... it is to improve her own self-sufficiency. If she udnerstands that, it might change her approach to things.

And finally, she is your sister -- Just help the girl out.