URGENT!! PLEASE HELP!!!!

a) Identify three (3) situations that would cause this economy to produce 4 points at level X. b) Calculate the opportunity cost of producing each extra automobile as this economy shifts production from level D to level C. Show all calculations. c) Prove that this economy is greatly affected by the law of increased relative costs. * PRODUCTION POSSIBILITIES CURVE FOR OURLAND D 90 B X 70 C Automobiles 50 D 30 10 E 0 1 2 3 4 5 6 7 8 9 10 Computers (thousands)