4. [2 points] we have talked a lot about shocks, demand and supply. When a shock takes place, there is a period that economist call the short run, and then the long run. a) At what point is the transition between short run and long run? What are we looking for to change? ~ b) Can you identify in the following graphs what we look for? (I present 3 graphs, tell me which is important to identify short and long run, and why)