1.If government spent, let's say $1B on a park construction project it is counted as government spending. However, if government were to disburse the same amount by extending unemployment benefits, it won't be counted as government spending. Why is that?

2.Out of the four key components that made up the nation's GDP under the expenditure approach, which one of the four is the most directly impacted by government's tax policy? State how?

3.Why can't the overall rate of unemployment be at zero percent?