For given language $L=\{abb,bc,abc\},$ which of the following does NOT belong to $L^{***}?$

a$)$ abbbcabbabc

b$)$ bcabbbcabb

c$)$ abcbabcabb

d$)$ bcabcabbbc

Which of the following is a RE that denotes the language accepted by the FA below?

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

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

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

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

The following two questions are related to "Kleene Plus" which is described as follows. Kleene Plus" of a language $L$ is defined as $L^{+}=L{L}^{***},$ the concatenation of $L$ with $L^{***}.$

Which of the following statements is false?

a$)$ If $L=\{abc\},$ then $.$