ibook G3 10.2.8 to G4 10.3.9 ???

I own a G3 ibook with OS 10.2.8, what I want to do is up grade its' OS software to 10.3 or better. Can I do that with the software that came with my with my new G4 ibook OS 10.3.9.

Is is possible?

It is better to just go to some kind of an OS update web site and download updates?

If it is better to do OS updates, where do I go to do that?

Thanks

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