Can you help me with Task 1 please

The line graph provides the total worldwide revenue of different games on four platforms (Mobile Phone, Online, Console, and Handheld Games) between 2000 and 2006.
Overall, the combined global sales of all digital games steadily rose throughout the period given with handheld games accounting for the largest share. Although mobile phone, online and handheld games sales increased, console games fell consistently.
Handheld games registered about $11 billion worth of sales in 2000. its revenue climbed every year to reach $17 billion in 2006. The same trend was seen in both Mobile Phone and Online Games, each starting with almost negligible sales for the first three years. Thereafter, their sales grew significantly and rose to $7 billion and $9 billion respectively by the end of the period.
Regarding the revenue of Console Games, it started at just below $6 billion in 2000; then it steadily went down by approximately $500 million annually. In 2006, the total sales were $3 billion, 50% lower than that of 2000.