4. Draw an AD-AS model for the US economy, assuming the economy is in LR equilibrium. And indicate the current state of the economy at point A. Use the model to explain what would happen to output and the price level in the short-run and in the long-run as a result of each of the following situations, all else equal: A. The US makes college/trade school tuition-free for everyone B. Tesla develops a battery that can power machines using half as much energy and is widely adopted in the US C. US firms increase the number of production facilities by 25% D. A particularly active hurricane season destroys shipping facilities along the Eastern coast of the US. E. Look back at problem set 8