Can you please explain the method in order to answer this question?

Figure 3-3 Chile's Production Possibilities Frontier Colombia's Production Possibilities Frontier an 30 $3.22,, 13 18 1:6 15 H I! 12 I2 10 ID 3 8 6 6 g 4 2 2 2 II 6 3 10 12 l! 15 13 20 WW 2 4 5 8 10 12 14 15 18 20 \"I\"! (inwards. (upwind: Page 2 ECONZIIB - Practice Questions [lst Midterm} 6. Refer to Figure 3-8. If the production possibilities frontiers shown are each for one day of production, then which of the following combinations of pounds of coffee and pounds of soybeans could Chile and Colombia together not make in a given day? a. 4 pounds of coffee and 1'? pounds of soybeans b. 8 pounds of coffee and 14 pounds of soybeans o. 16 pounds of coffee and 9 pounds of soybeans d. 24 pounds of coffee and 3 pounds of soybeans