5-27. Consider the following two relations for Millennium College: STUDENT(StudentID, StudentName, CampusAddress, GPA) REGISTRATION(StudentID, CourselD, Grade) Following is a typical query against these relations: SELECT Student_T.StudentID, StudentName, CourselD, Grade FROM Student_T, Registration_T WHERE Student_T. StudentID = Registration_T.StudentID AND GPA > 3.0 ORDER BY StudentName; a. On what attributes should indexes be defined to speed up this query? Give the reasons for each attribute selected