Complete the code that would create this scatterplot:

ggplot$($

data $=$ trees,

mapping $=$ aes$($

x $=1)\_\_\_\_\_\_\_\_\_\_\_\_\_,$

y $=2)\_\_\_\_\_\_\_\_\_\_\_\_\_$

$)$

$)+$

$3)\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$