$(4)$ Given L $=\{$w

$\{$a$,$ b$\}*$:

x

$\{$a$,$ b$\}+($w $=$ axa$)\}.$ The correct statements are:

Group of answer choices

L is the set of strings over the alphabet $\{$a$,$ b$\}$ that start and end with a$.$

L is the set of strings over the alphabet $\{$a$,$ b$\}$ that start and end with a whose length is at least $3.$

L is the set of strings composed of $3$ or more a$\text{'}$s$.$

is in L$.$

aba, aaa are in L$.$

aaa, aaaa, aaaaaa are in L$.$

aa is in L$.$