1. Find all strings in L ((a + bb)') of length five. 2. Find all strings in L ((ab + b) b (a + ab)") of length less than four. 3. Find an nfa that accepts the language L (aa (ab + b)). 4. Find an nfa that accepts the language L (aa (a + b)). 5. Does the expression ((0 + 1) (0 + 1))" 00 (0+1)* denote the language in the following example? Explain briefly why or why not.