The energy information Administration reported that the mean retail price per gallonof regu lar grade gasoline was $3.43 (energy information Administration, July 2012).Suppose that the standard deviation was $.10 and that the retail price per gallon has a bellshaped distribution.a. What percentage of regular grade gasoline sold between $3.33 and $3.53 per gallon?b. What percentage of regular grade gasoline sold between $3.33 and $3.63 pergallon?c. What percentage of regular grade gasoline sold for more than $3.63 per gallon?

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