"GDP per capital or any National Income statistics cannot be used to measure living standards or compare different countries, due to the number of deficiencies that it has".

i. EXPLAIN how national income data is compiled? (8 marks)

ii. What deficiencies is this statement talking about? (6 marks)

iii. Why do Economists still use GDP per capital to compare or rank countries if there are such deficiencies? (6 marks) (Total 20 marks)

Can you please also provide me with accurate references for answers.