Below is a dataframe df that contains information on the changes in value for three of the highest performing stocks. The increase in value per share is shown per month since month $1.$

The code below was used to make the graph. There are $4$ missing pieces of the code. They

are represented by $??1??,??2??,??3??$ and $??4??.$

ggplot$($df$,$aes$($x$=$month,y$=$value,??$1??=$ stock$))+$ geom$\_??2??()+$theme$\_??3??()+$scale$\_??4??\_$manual$($values$=$c$("$#$1736$A$9","$#F$3$B$524","$#F$3244$F$"))$

$1.$ What is $??1??$ of the code? color, group, z$,$ or line??

$2.$ What is $??2??$ of the code? curve, line, step, or color??

$3.$ What is $??3??$ of the code? bw$,$ classic, none, or minimal??

$4.$ What is $??4??$ of the code? fill, line, group, or color??