a) Define what a "Final Good" is. (1 mark) b) i. Using the expenditure approach, calculate the GDP of a large nation based on the following data: Consumption: $255 billion, Investment: $84 billion, Government: $103 billion, Exports: $249 billion and Imports: $233 billion. Write your formula and show your workings clearly. (3 marks) ii. Define what "Investment" is in this context. (1 mark) C) The production and prices of Pianos and Flutes in Melody Land in 2020 and 2021 are as follows: Quantity of Price of Quantity of Price of Pianos Pianos Flutes Flutes 2020 100,000 $1200 5,000 $350 2021 105,000 $1250 8,000 $375 Taking 2020 as the base year, calculate the: i) Nominal GDP in 2021 (2 marks) ii) Real GDP in 2020 and 2021 (4 marks) iii) Real GDP Growth Rate in 2021 (2 marks) iv) Nominal GDP per Capita in 2021 if the population is 750. (2 marks) Please show your workings clearly and present all your final answers up to 2 decimal places. (Total: 15 marks)