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The diagram below shows the production possibilities curve of Country XYZ Pen (Unit) BO A B 75 C 65 50 D 25 0 2 4 6 8 10 Book (Unit) Answer the following questions a) Define the production possibilities curve. (2 marks) b) State the type of opportunity cost face by the firm. Justify your answer. (2 marks) c) Calculate the opportunity cost by increasing the production of: i) book from C to D. ii) 10 units of book. iii) pen from E to B. iv) 50 units of pen. (4 marks) d) State the following point indicate: i) If the country produces 75 units of pen and 4 units of book. ii) If the country produces 50 units of pen and 6 units of book. iii) If the country produces 25 units of pen and 2 units of book. (3 marks) e) State any two (2) types of opportunity cost and any two (2) shape of PPC. (4 marks)