Complete this chunk of code that will make the plot accessible to those who are colorblind:

ggplot$($

data $=$ mtcars,

mapping $=$ aes$($

x $=$ wt$,$

y $=$ mpg$,$ color $=$ cyl

$)$

$)+$

geom$\_$point$()+$

geom$\_$smooth$()+$

scale$\_1)\_\_\_\_\_\_\_\_\_\_2)\_\_\_\_\_\_\_\_\_\_\_\_$