Show all the necessary steps that lead to your answer.

1. Consumption $6000 (in billion)

Gross Investment 1500

Indirect business taxes 300

Retained earning 244

Corporate taxes 100

Social securities taxes 800

Government purchases 1500

Export 500

Transfer payments 1000

Net interest 500

Net foreign factor income 4

Depreciation/ 800

Capital consumption allowance

Import 100

Personal income tax 200

a. Calculate GDP from the above figures

b. Calculate national income from the above figures

c. Calculate personal income from the above figures

d. Calculate disposable income from the above figures