Question $2)$ In December, General Motors produced $6,600$ customized vans at its plant in Detroit. The labor productivity at this plant is known to have been $0\mathrm{.}10$ vans per labor$-$hour during that month. $300$ laborers were employed at the plant that month.

How many hours did the average laborer work that month?

If productivity can be increased to $0\mathrm{.}11$ vans per labor$-$hour, how many hours would the average laborer work that month?

Question $3)$ Lake Charles Seafood makes $500$ wooden packing boxes for fresh seafood per day, working in two $10-$hour shifts. Due to increased demand, plant managers have decided to operate three $8-$hour shifts instead. The plant is now able to produce $650$ boxes per day.

Calculate the company's productivity before the change in work rules and after the change.

What is the percentage increase in productivity?

If production is increased to $700$ boxes per day, what is the new productivity?