These answers would be best answered by his attorney after reviewing the facts, any defenses and reviewing his criminal history. Those are the factors that will largely dictate his sentence if he gets one. After all, he might be not guilty!
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Answers to this cannot be given until many questions are answered. We would need to know his prior record, what occurred that day, what injuries were the result, was a weapon used etc. Do not share that on-line. Your friend needs to sit down with an experienced criminal defense attorney. Also, do not assume that just because he was charged with those offenses that he will be convicted.