Q38

Consider the following languages over the alphabet $\Sigma = \left \{ a, b, c \right \}$. Let $L_{1} = \left \{ a^{n}b^{n}c^{m}\mid m,n \geq 0 \right \}$ and $L_{2} = \left \{ a^{m}b^{n}c^{n}\mid m,n \geq 0 \right \}$. Which of the following are context-free languages? I only II only I and II Neither I nor II