4. (Question 18 on P69) ToolCO manufactures Philips (P), Torx (T) and Flathead (F) screwdrivers in different sizes (1,2,3,4,5). The IE manager is concerned about high product defect rates but has limited resources to address all the problems. Given the following data (defects per batch of 100), identify the product problems to be addressed first. Why? What procedures, tools, charts, diagrams, etc. should be used in this case. Model 1 Philips 2 Torx 3 Flat 4 2 1 0 1 3 0 1 0 4 0 0 0 5 0 0 0