You need to know the following to do the questions: DFA (Deterministic finite automaton), NFA (Nondeterministic finite automaton), PDA (Pushdown automaton), Pumping Lemma, CFL (Context-free language), Chomsky normal form, Turing machine.
There are 9 questions.
It is not very long if you know the material. I need it by April 11. It would be great if someone can do it for 30$.