Question #$7(5$ Marks$)$

$L=\{w|win\{a,b{\}}^{*},|w|2\}$

set of all strings having at most $2$

lenght $\}$

$($a$)E+a+aa$

$($b$)E+b+bb$

$($c$)(E+a+b{)}^2$

$($d$)(E+a+ab{)}^2$