$20\mathrm{.}5\mathrm{.}2-$ Suppose list$1$ is a list that contains the strings red, yellow, and green and list$2$ is another

list that contains the strings red, yellow, and blue. Answer the following questions:

a$.$ What are list$1$ and list$2$ after executing list$1.$addAll$($list$2)?$

b$.$ What are list$1$ and list$2$ after executing list$1.$add$($list$2)?$

c$.$ What are list$1$ and list$2$ after executing list$1.$removeAll$($list$2)?$

d$.$ What are list$1$ and list$2$ after executing list$1.$remove$($list$2)?$

e$.$ What are list$1$ and list$2$ after executing list$1.$retainAll$($list$2)?$

f$.$ What is list$1$ after executing list$1.$clear$()?$