Scrimmage Kick/penalty enforcement

[Twag]

During a pregame this question was posed to our crew. We've been bantering back and forth since last Friday.

What’s the answer:

K punts from their 45. There is first touching by K at K’s 48. The ball bounces behind the neutral zone and K picks it up and advances it for a touchdown. Prior to the touchdown, R commits a facemask at R’s 5. Is it a touchdown? Where is the penalty enforced from?

Half of us are saying it should be R's ball at the 48 because K had first touching beyond the neutral zone. The other half say, any ball recovered behind the neutral zone regardless of touching can be advanced, touchdown and penalty enforced on PAT or KO.

Rule 6-2-2, 3, 4 talks about catch and recover. 6-2-5,6 talk about first touching. I've done my research and am still confused. Can anyone put this in everyday english for me so i can understand.