Carbondale Casting produces cast bronze valves on a 12-person assembly line. On a recent day, 180 valves were produced during a 6-hour shift. a) Labor productivity of the line =2.5 valves/labor hour (round your response to two decimal places). b) John Goodale, the manager at Carbondale, changed the layout and was able to increase production to 200 units per 6 -hour shift. The new labor productivity = valves/labor hour (round your response to two decimal places)