F-15C Questions

Hi all

Ok, we all know that the USAF’s F-15Cs will be replaced by the F/A-22As. My questions are: What will happen with these Eagles that were replaced? This is the end for it, or the USAF will replace the F-15A/Bs with the F-15C/Ds?

Finally: The USAF’s Air Combat Command will keep some units with the C/Ds or the whole fleet (C/Ds) will be replaced?

Thanks in advance