ABSTRACT
Now turn to page 87. You will find the correct answer to the first frame alongside the “A” frame on this page. Compare your answer with the printed answer and, if you are correct, study this “A” frame. (If your answer is wrong turn back to the “A” frame on the top of page 85 and try to identify your mistake before returning to frame 87A). The correct answer to 87A will appear over the page adjacent to 89A.
