Finding Center Line Between Two complex curves

Hello Solidworks community,

What are some ways that I can get centerlines between two complex curves (in general)

I included an image as an example. I want to generate a center line between the two curves in a closed contour.

How would I do this for multiple closed contours in the same sketch say...?

These are arbitrary sketches for a more complex drawing I have.

Would really appreciate some insight, thanks a bunch!

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