Find all strings in $L((a+bb{)}^{**})$ of length five.

Find all strings in $L((ab+b{)}^{**}b(a+ab{)}^{**})$ of length less than four.

Find an nfa that accepts the language $L(a{a}^{**}(ab+b)).$

Find an nfa that accepts the language $L(a{a}^{**}(a+b)).$

Find a regular expression for the set $\{\begin{array}{c}{a}^n{b}^m\text{:}n3\\ m\end{array}$ is odd