According to Keynesian economic theory, during times of recession governments should

During times of economic recession (or “bust” cycles), Keynesian Economic Theory argues that governments should increase spending on social programs in order to stimulate the job market with an influx of skilled labor. ... Thus, the economy would be able to slowly get out of a recession through a strong labor force.

Explanation:

the two sets of lines are :

1. seasonal

2. frictional unenployment

3. the number of the labor force multiplied by 100 and then subtract the number of unemployed.

4. 4%

5. an increase in prices