only solve question 4 please

1. An exogenous decrease in the velocity of (www.nber.arg) and find the latest turning money. point in the business cycle. When did it occur? h. An exogenous increase in the price of oil. Was this a switch from expansion to contraction or the other way around? List all 4. The official arbiter of when recessions begin the recessions (contractions) that have occurred and end is the National Bureau of Economic during your lifetime and the dates when they Research, a nonprofit economics research began and ended. group. Go to the NDER's Web site