The people of Foodland have 40hours of labor a day to bake pizza and bread. The table shows the maximum quantitiesof either pizza or bread that Foodland can producewith different quantities of labor. Can Foodland produce 30 pizzas and 30loaves of bread a day? If it can, is this output efficient, do the people onFoodland face a tradeoff, and what is the opportunity cost of producing an additionalpizza?

Labor	Pizzas		Bread   (loaves)
0	0	or	0
10	30	or	10
20	40	or	20
30	60	or	30
40	65	or	40

这个应该怎么去分析呢