Amanufacturing company employs two devices to inspect output for quality control purposes. the first device is able to accurately detect 99.3% of the defective items it receives, whereas the second is able to do so in 99.7% of the cases. assume that four defective items are produced and sent out for inspection. let x and y denote the number of items that will be identified as defective by inspecting devices 1 and 2, respectively. assume that the devices are independent. determine: a. fxy (x, y) b. fx(x) c. e(x)