Consider an assembly line with 20 stations. each station has a 0.5% probability of making a defect. at the end of the line, an inspection step singles out the defective units. the inspection step catches 80% of all defects. from inspection, units that are deemed to be non-defective are moved to the shipping department. if a defect is found at inspection, it is sent to the rework department. rework fixes about 95% of the defective units. units are directly shipped from the rework department with no further inspection taking place. what is the probability that a unit ends up in rework (in decimal form)?