12. Define first normal form. 13. Define second normal form. What types of problems might you encounter using tables that are not in second normal form? 14. Define third normal form. What types of problems might you encounter using tables that are not in third normal form? 15. Using the functional dependencies you determined in Question 11, convert the following table to an equivalent collection of tables that are in third normal form. 16. List the changes you would need to make to your answer for Question 11 if the require-ments change so that a student can have more than one advisor