Help with these 4 questions.

Question 8 4 pts Changes in which of the following will cause the aggregate demand (AD) curve to shift? Select all that apply. O Human Capital Investment Exports and Imports Natural Resources Consumption Technology Government Purchases D Question 11 1 pts The economy can produce a level of output below potential output but is not capable of producing more than potential output. O True O False D Question 12 1 pts It is important to draw potential output on our aggregate supply and aggregate demand diagrams because it is used as a reference point to compare where the economy is in the short run to where it will end up in the long run. True O False D Question 15 5 pts Changes in which of the following will cause the aggregate supply (AS) curves to shift? Select all that apply. O Human Capital Investment O Exports and Imports O Natural Resources Consumption O Technology Government Purchases Physical Capital O The number of workers