4. During the sales life cycle, which is an example of what happens during the introduction phase? Sales and price decline, as do the number of competitors. b. Sales continue to increase but at a decreasing rate. The number of competitors and product variety decline. C. Sales increase rapidly along with an increase in product variety. d. Sales rise slowly as customers become aware of the new product or service. Product variety is limited. 5. A common characteristic among control charts, histograms, Pareto diagrams, and cause-and-effect # diagrams is that they are all: a. Based on relevant cost and relevant revenue data. b. Useful tools for preventing quality problems from occurring. Visual representations aiding the detection of quality-related problems. d. Statistically based models of high-quality and low-quality outputs. C