7. (10 points) A Two-Faced Question. If L is any language, define the language Janus(L) to be {W: W E L and WR E L}. Prove that if L is regular, so is Janus(L). 7. (10 points) A Two-Faced Question. If L is any language, define the language Janus(L) to be {W: W E L and WR E L}. Prove that if L is regular, so is Janus(L)