Briefly explain frictional unemployment. 2. Briefly explain structural unemployment. 3. Briefly explain cyclical unemployment. 4. What is the current US unemployment rate (google unemployment rate us, and you should see a chart from the Bureau of Labor Statistics) 5. Calculate CPI if the current year is 250 and the previous year was 225.(round to 2 decimals) 6. Calculate CPI if the current year is 250 and the previous year was 300.(round to 2 decimals)