16ohm and 32ohm speakers together in 8x10 bass cab?

Hello, first post here on the forums.

I'm looking for some guidance- I bought an old, beat-up Ampeg 810en cab as a project to help me learn more about speaker wiring and electrical engineering. It has all eight speakers in it, however only four of them (the top four) are the factory 86-032-01s (32ohm). The bottom four are all aftermarket 16ohm speakers. I can't find any information online about this wiring configuration or what impedance they'd read together. Does anyone know what might be going on?

One of the 16ohm speakers is busted and needs to be reconed/replaced. I'm wondering if I should just buy four more 32ohm speakers and wire it all in parallel, or if I can save some cash and get one replacement 16ohm speaker -- if so, how would I wire these 8 speakers together?

Thank you!:)