Question #$6(5$ Marks$)$ Question #$6$ Continued

Which of the following is ODD?

$($A$)(a+b{)}^{*}b$

$($B$)(a^{*}{b}^{*}{)}^{*}b$

$($c$)(a^{*}b{)}^{+}$

$($d$)(a^{*}b{)}^{*}$ Question #$7(5$ Marks$)$

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

set of all strings having at most $2$

lenght

Which of the following is ODD?

$($A$)a(a+b{)}^{*}$

$($B$)a{a}^{*}(a+b{)}^{*}$

$a^{*}(a^{*}{b}^{*}{)}^{*}$

$($D$)(a{b}^{*}{)}^{+}$