I'm wondering about the comma usage in the following sentences:
"First, I would advise that you stop poring through medical books, looking for some miracle cure for your problem."
"I really want to work with Julio on this, and I am left with a lot of extra time since the last project fell through."
In the first sentence, s the comma before "looking" necessary or unnecessary? In the second sentence, is the comma before "and" necessary, and is repeating the subject, "I," necessary? Thank you very much! I appreciate any detail you can give in your explanation :)
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