Explain the following using the figure below. a According to Keynes, aggregate demand may be insufficient to bring about the full-employment output level (or Natural Real GDP). b A decrease in...

Explain the following using the figure below.

a According to Keynes, aggregate demand may be

insufficient to bring about the full-employment

output level (or Natural Real GDP).

b A decrease in consumption (due to increased saving) is not matched by an increase in investment

spending.

The TE curve in Exhibit 8(d) is upward sloping

because the consumption function is upward sloping.

Explain.