Which of the following is the best example of business process re-engineering to attain operational excellence? Explain your selection. (1) Acer Phones uses advanced statistical methods to remove the causes of defects at its manufacturing units. (2) Ericsson introduces continuous-improvement business philosophy at its customer care centers. (3) Cellkon pulls the pieces of an activity out of different departments to create a cross-functional work group. (4) Honeywell strives to incrementally reduce defects through an ongoing assessment process