true or false for the following questions.

27.A decrease in the general price level shifts the Aggregate Expenditures curve up and increases the equilibrium output.

28.In oil-exporting countries like Canada, a slump in oil prices shifts both the Aggregate Demand and short-run Aggregate Supply curves to the left.

29.In the Aggregate Demand-Aggregate Supply model, macroeconomic equilibrium always occurs at the intersection of the Aggregate Demand curve and the Long-run Aggregate supply curve.

30.A progressive income tax system automatically raises tax revenues during economic booms and reduces tax revenues during economic recessions.

31.Asymmetries in the Phillips curve show that an inflationary gap of a given size shifts the Short-run Aggregate Supply curve more strongly to the left than a recessionary gap of a similar size shifts it to the right.

32.In oil-exporting countries like Canada, an increase in oil prices raises the general price level but have uncertain effect on output.

33.The long-run Aggregate Supply curve shows how much output businesses will supply at any given price level.