The line graph given below shows the yearly sales figures for a manufacturing company during the last five years.
Study the above graph carefully and answer the questions given below:
(i) What were the sales in (a) 2013 (b) 2015 (c) 2016?
(ii) Compute the difference between the sales in 2012 and 2016?
(iii) In which year was there the greatest difference between the sales as compared to its previous year?