PLEASE HELP ME WITH THIS PROBLEM AS QUICK AS YOU CAN. That would really help me out greatly. THANK YOU! 1. What is the value of a Regular Expression? 2. What is the value of the following regular expressions over the alphabet {a,b,c}: a. a* b.(a u buc) c. (a u buc) C* d. (a u buc)* 3. Give 3 examples of strings in the languages described by each of the above regular expressions. 4. How are regular expressions useful in applications involving text