The ratio of yellow to red stickers on a page is 5 to 4.
Which statement is true? 1 . For every 5 yellow stickers, there are 9 red stickers.

2 . There could be 15 yellow stickers and 14 red stickers.

3 . There could be 25 yellow stickers and 20 red stickers.

4 . There are exactly 9 stickers on the page.