Suppose that mean retail price per gallon of regular grade gasoline is $3.59 with a standard deviation of $0.10 and that the retail price per gallon has a bell-shaped distribution. NOTE: Please use...

Extracted text: Suppose that mean retail price per gallon of regular grade gasoline is $3.59 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 $3.49 and $3.69 per gallon (to 1 decimal)? b. What percentage of regular grade gasoline sells for between $3.49 and $3.79 per gallon (to 1 decimal)? c. What percentage of regular grade gasoline sells for more than $3.69 per gallon (to 1 decimal)?