Q: Battery or alternator?

asked by on October 06, 2016

As I was coming down the road, my radio started messing up. Its like the songs was skipping. Well I turned the volume up and turned my ac on. Next thing I know my car cuts off. I got my uncle to jump it and it cranked. When I turned it off to see if it will crank, it wouldn't. The radio works and if I have my key in, then it beeps if I have the door open. It tries to turn over but won't. Is this problem my alternator or battery or something else?
My car has an automatic transmission.

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