2. (20 points) Consider the following regular set over { = {a,b}. Which of the following correctly represents the language given by S2? (4 points) Explain your answer. (16 points) S2 = {a}+ {a,b}* {b}+ 1. Set of all strings that start with a 2. Set of all strings that end with b 3. Set of all strings that start with a and end with b 3. Set Of all stringsve (provid 5. None of the above (provide your own answer and explanation.)