Table Charts - General Questions

Number of laptops (in thousands) sold by five brands over the years

Year	Brand A	Brand B	Brand C	Brand D
2016	45	55	165	140
2017	90	110	195	185
2018	120	145	160	160
2019	30	50	80	65
2020	75	65	195	190

What is the average annual sales of Brand B (in thousand laptops)?

What is the ratio of the sales of Brand D to that of Brand B in 2016?

In which year was the total sales of all the brands taken together the highest?

In 2019, the sales of Brand A is approximately what percent of the total sales of that year?

What is the difference between the total sales in 2016 and in 2018 (in thousand laptops)?