Hint(s) Check My Work (No more tries available) Suppose that mean retail price per gallon of regular grade gasoline is $3.43 with a standard deviation of $0.10 and that the retail price per gallon has a bell- shaped distribution. NOTE: Please use empirical rule approximations for this problem. a. What percentage of regular grade gasoline sells for between $3.23 and $3.63 per gallon (to 1 decimal)? % b. What percentage of regular grade gasoline sells for between $3.23 and $3.53 per gallon (to 1 decimal)? % c. What percentage of regular grade gasoline sells for more than $3.63 per gallon (to 1 decimal)? * %