$$L = {L_1} \cap {L_2}$$ where $${L_1}$$ and $${L_2}$$ are languages defined as follows.
$${L_1} = \left\{ {{a^m}{b^m}\,c\,{a^n}{b^n}\left| {m,n \ge 0} \right.} \right\}$$
$${L_2} = \left\{ {{a^i}{b^i}{c^k}\left| {i,j,k \ge 0} \right.} \right\}$$ Then $$L$$ is

Given below are two finite state automata ($$ \to $$ indicates the start state and $$F$$ indicates a final state)

Which of the following represents the product automation $$ZY$$?

Match the following $$NFAs$$ with the regular expressions they correspond to

Which of the following are regular sets?