Which, if any, of the curves in the figures below look like a normal curve? If a curve is not a normal curve, tell why. (There are four curves. You will be presented the curves one at a time.)not normal; not bell-shapednot normal; skewed left not normal; dips below horizontal axisnormalnot normal; not smooth

normalnot normal; not smooth not normal; dips below horizontal axisnot normal; skewed leftnot normal; not bell-shaped

not normal; not bell-shapednot normal; not smooth not normal; skewed leftnot normal; dips below horizontal axisnormal

not normal; skewed leftnormal not normal; not smoothnot normal; not bell-shapednot normal; dips below horizontal axis