3. To see the usefulness of indexed addressing, consider a simple example involving a list of test scores for students taking a given course. Assume that the list of scores, beginning at location LIST. A 30- word MB comprises a record that stores the relevant information for each student. Each record consists of the student's identification number (ID), followed by the scores the student earned on 29 tests. There are n =45 students in the class, and the value n is stored in location N immediately in front of the list. The addresses given for the student IDs and test scores assume that the memory is byte addressable and that the word length is 32 bits. Each row contains the entries for one student, and the columns give the IDs and test scores. Suppose that we wish to compute the sum of all scores obtained on 5,12,17,25 tests, and store these four sums in memory locations SUM4, SUM11, SUM14, and SUM23. Label ALN Comments Memory arrangement for the program Memory address label Operation Addressing or data in information Assembler directive ORIGIN Assembler directives ORIGIN Assembly language representation for the program