How do you switch from quadface to subd?

I’m sorry, I’m getting tired of this, but I lost part of my left brain in a stroke. So, every time something comes up, and I am forced to take a break, I forget little things, like how to get these three pieces from quadface to SubD where I can use the vertex tools. I need someone to break it down for me, instead of “showing” it to me
(gosh, I can’t believe I just said that). If you could help that would be great!

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