What is the "level of analysis" for a social psychologist?

What was the midwest states often called because they were located in the center of the nation

Say a certain manufacturing industry has 63.1 thousand jobs in 2008, but is expected to decline at an average annual rate of 1.7 thousand jobs per year from 2008 to 2018. assuming this holds true, what will be this industry’s percent change from 2008 to 2018? a. 70% b. -27% c. -17% d. -75%

At what age must a person begin receiving their roth 401(k) payments?