Riverside Metal Works produces cast bronze valves on a $10-$person assembly line. On a recent dav, $160$ valves were produced during an $8-$hour shifta Labour productivity of the line $=$ valves$/$labour hour. $($Round vour response to two decimal places.$)$b$)$ The manager at Riverside changed the layout and was able to increase production to $180$ units per $8-$hour shift. The new labour productivity $=$ valves$/$labour hour. $($Round your response to twodecimal places.c$)$ The percentage of productivity increase $=\%.($Round your response to one decimal place.$)$