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1) There is no such thing as an upper bicep. My friend said the same thing to me - what he meant was the divide between his deltoid and his biceps. This may be what you meant. Doing curls works biceps - you don't need to work upper or lower.
2) Spot training doesn't really work. Meaning, doing situps isn't going to earn me a six-pack. Doing curls or some special workout doesn't target fat in that area - doing cardio and controlling your diet over time will reduce fat in all areas, one of which may be your arms if they're a little flabby.