are these legacy lenses any good?

I a few pentax-mount legacy lenses from a friend's mom. Are any/all of these worth investing in an adapter for my G1, and if so, what adapter do I need?

Vivitar 75-205mm 1:3.8
Super Takumar 55mm 1:2
Soligar 28mm 1:2.8

Thanks in advance!

--
Kim
Panasonic G1
Panasonic 14-140mm HD
Panasonic Leica 45mm macro
Panasonic 14-45mm (to be sold soon)
Panasonic 45-200 (to be sold soon)
Panasonic FZ30
Panasonic ZS3
Raynox 150 & 250
ProMaster 3.5/100mm macro 'plastic fantastic'
Olympus FL-36

If everything happens for a reason, what's the reason?!
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