What is the basis of international law

Question 1 (2.5 marks each – total 10 marks) a) What is the basis of international law? Is it a sufficient basis to accommodate . developments in modern international law? b) ‘The relationship between treaty and custom, as sources of international law, is too complex to make any sense.’ Discuss. c) On what basis can the United Liberation Movement for West Papua (ULMWP) claim independence under international law? d) ‘The various methods for settling international disputes are not significantly different from one another. In fact, we can regard them as much the same.’ With reference to two methods of settling international disputes peacefully, examine the validity of this statement.