The cumulative advance decline line reported in Barrons at the end of the month is 21,240. During the first week of the following month, the daily report for the Exchange is as follows: Day 1 2 3 4 5 Issues traded 3,544 3,533 3,540 3,531 3,521 Advances 1,737 1,579 1,759 1,217 1,326 Declines 1,289 1,484 1,240 1,716 1,519 Unchanged 518 470 541 598 596 a. Compare the daily net advance-decline line for each of the five days. b. Compute the cumulative advance-decline line for each day and the final value at the end of the week.