Describe the effects of each of the following events on the US economy $($i

$.$e$.$ What may happen to the price? To the real output?$).$ Explain briefly what cause these effects $($i$.$e$.$ What happens to determinants of AD or AS or both? Why? $).$ Illustrate your answers in given AD $-$ AS diagrams. Label your diagrams and changes carefully.

a$.(10$ points$)$ US dollar appreciates significantly.

b$.(10$ points$)$ A hurricane destroyed major gas pipelines and resulted in a sharp increase in energy prices for months.