There are many old tests and sample problems on this site. In general I have not posted answers (there are some exceptions). My philosophy is that you need to learn how to check your own answers. Even if your batting average is not 100 % you'll be better off. There is no answer book for life and you might as well come to terms with this fact, and practice the appropriate skills for checking your proposed answers.
If you get stuck feel free to ask me to do one or two problems. Will I get the right answer? Probably, most of the time, but it would still be useful if you could check up on me. Then you can have the pleasure of telling me that I screwed up, and I will have the pleasure of knowing that you "got it!"
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