Study the given graph and answer the question that follows.

What is the ratio of the total production of paper by company A in 2016 and 2019 to the total production of paper by company B in 2014 and 2017?

9 : 7

Total production of paper by company A in 2016 and 2019  : Total production of paper by company B in 2014 and 2017

 ( 120 + 150 )  :  ( 60 + 150 )

        270         :        210

          9           :          7