Carbondale Casting produces cast bronze valves on a 12-person assembly line. On a recent day, 200 valves were produced during a 4-hour shift. a) Labor productivity of the line = nothing 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 220 units per 4-hour shift. The new labor productivityequals nothing valves/labor hour (round your response to two decimal places). c) The percentage of productivity increaseequals nothing% (round your response to one decimal place).