Many factors influence the retail price of gasoline, Suppose the following table shows the average retail price for a gallon of regular grade gasoline for each year from 2011 through 2014. (Round your answers to one decimal place.) Year Average Price ($) 2011 3.516 2012 3.608 2013 3.505 2014 3.363 (a) Use 2011 as the base year and develop a price Index for the retail price of a gallon of regular grade gasoline over this four-year period. 2011 price Index 2012 price Index 2013 price Index 2014 price Index (b) Use 2012 as the base year and develop a price Index for the retail price of a gallon of regular grade gasoline over this four-year period. 2011 price Index 2012 price Index 2013 price Index 2014 price Index Submit