Apple Inc. reports the following for three of its geographic segments for a recent year. ($ millions) Americas Europe China Operating income $ 30,684 $ 16,514 $ 17,032 Sales 96,600 54,938 44,764 Compute profit margin for each division. (Round your answers to 1 decimal place.)

Statistical process control charts: a. indicate to the operator the true quality of material leaving the process. b. display upper and lower limits for process variables or attributes and signal when a process is no longer in control. c. indicate to the process operator the average outgoing quality of each lot. d. display the measurements on every item being produced. e. are a graphic way of classifying problems by their level of importance, often referred to as the 80-20 rule.