Topic is macroeconmics

I had sent this question before, the last thing it was reviewing, but the internet was disrupted.

Can you please define the following terms and give some examples of each as I have a presentation to do on it. Also the source please and thanks

a) Compensation of employees

b) Proprietor's Income

c) Rental Income

d) Corporate Profits

e) Net Interest

f) Indirect Tax less subsidies

g) Net Business Transfer Payments

h) Surplus of government enterprise

I) Explain why is it necessary to measure the National Income every year?

j) Why is the measure though to be grossly inaccurate?