You can read about all of those lenses in our lens database:
Pentax Lenses - Pentax Lens Reviews & Lens Database
For more info, I'd also recommend that you start a new thread in the lens section.
Generally-speaking, all three of the lenses are run-of-the-mill in terms of image quality. They'll get the job done, but aren't stellar. The same goes for the K100D (by modern standards), but the camera will certainly give you everything you need for a photo course.
BTW, I wouldn't both with the mirror lens, as it's got low image quality and basically requires a tripod.
Adam
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