I need help completing this worksheet that I don't understand.

Name Production Possibilities Frontier Worksheet 1. Farmer Brown has four fields that can produce corn or tobacco. Assume that the trade-off between corn and tobacco within each field is constant. The maximum yields are given in this table: Field A B C D Corn 40 30 20 10 Tobacco 10 20 30 40 a. Draw Farmer Brown's ppf. b. To be on the ppf, what conditions must hold true? c. Brown is currently producing only corn: if he wants to produce some tobacco, in what order would he switch his fields from corn to tobacco production? What law does this represent? Explain. d. If Farmer Brown wishes to produce more of either corn or tobacco, or both, what are some options he should put into operation? Corn Tobacco Both