need help with these questions please.

The linear production possibility frontier in the US indicates that the US can produce 10 tons of wheat in day or 2 cars. Japan can produce 8 tons of wheat or 2 cars in a day. The opportunity cost of producing a car in the US is 1/2 a ton of wheat. O 1/5 tons of wheat. O 10 tons of wheat. O 5 tons of wheat.Consider the following: Hours Needed to Make 1 iPhone Gallon of Milk Engineer 2 40 Farmer 150 10 The Farmer should specialize in the production of O milk production. O both goods. O iPhone production. O neither good