Phrasal verb - come up with

1. Sorry, guys.  Something just came up to do with my daughter. I have to leave now.

2.  Sorry, guys.  Something just came up having to do with my daughter. I have to leave now.

I think both 1 and 2 are correct or 1 is wrong because “came up” cannot be followed by “infinitive”?

3. Something just came up requiring my attention.  

4.  Something just came up that requires my attention.

Is 3 requiring xxx a participial phrase?

Is 4 that requires xxx a relative clause?

thanks.

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