Need some help with these homework questions, thanks!

Question 9 4 pts Using the Keynesian aggregate expenditures model, which of the following is true? 0 At any macro equilibrium, the actual rate of unemployment must equal the natural rate of unemployment. 0 If an economy is operating below full employment capacity, the Keynesian model indicates that lower wage rates will automatically adjust the economy back to full employment. 0 All of these are correct. 0 Macro equilibrium may occur at levels of real GDP other than full-employment real GDP. Question 10 4 pts Which of the following is the largest source of revenue for the federal government? 0 personal income tax 0 payroll tax 0 excise tax 0 corporate income tax