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Exercise 13-43 Multiple-Year Trend Reports The controller of Ephraim, Inc. has computed quality costs as a percentage of sales for the past 5 years (20X1 was the first year the company implemented a quality improvement program). This information is as follows: Required: 1. Prepare a trend graph for total quality costs. Comment on what the graph has to say about the success of the quality improvement program. 2. Prepare a graph that shows the trend for each quality cost category. What does the graph have to say about the success of the quality improvement program? 3. Prepare a graph that compares the trend in relative control costs versus relative failure costs. Comment on the significance of this trend. 4. Of the three data visualization approaches illustrated by Requirements 1 through 3 , the controller argued that the trend graph for each quality cost category provides more insight than the other two graphs. Offer reasons to justify the controller's position